Numbers 9,900,000,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

9,100,000,0009,200,000,0009,300,000,0009,400,000,000

9,500,000,0009,600,000,0009,700,000,0009,800,000,000 – 9,900,000,000

[1B] – [2B] – [3B] – [4B] – [5B] – [6B] – [7B] – [8B]  – [9B] & [10B]

1  - 10 - 100  - 1000 - 10,000 - 100,000 - 1M - 10M - 100M1B10B - 100B - 1T - 10T - 100T - 1Q ...

9,925,140,625

[Math.]   99,6252 = 9,925,140,6252. (Sequence of numbers 9…9625).

9,936,301,761

[Math.]   Sum of the first 446 cube numbers:

13+…+4463 = 9,936,301,761 = (1+2+…+446)2 = 99,6812.

9,976,199,767

[Math.]   The largest prime number formed by 2 consecutive 5-digit prime numbers 99761 and 99767.

9,980,010,000

[Math.]   (Sequence of numbers (10n–10m, n > 2m).

9,980,010,000 = (99800+100+00)2 = 999002.

9,980,209,801

[Math.]  9,980,209,801 = (99802+0+98+01)2 = 999012.

9,981,808,281

[Math.]  (Sequence of numbers (10n–91), n ³ 3)

9,981,808,281 = (99818+082+8+1)2 = (99818+08+2+81)2 = 999092.

9,986,989,767

[Math.]  Two consecutive sums of consecutive numbers, (largest 10-digit):

4,635,409+…+4,637,562 = 4,637,563+…+4,639,715 = 9,986,989,767.

9,989,003,025

[Math.]  9,989,003,025 = (99890+030+25)2 = 999452.

(Sequence of numbers (10n–55), n ³ 4).

9,992,801,296

[Math.]  9992801296 = (99928+01+29+6)2 = 999642.

9,992,929,141

[Math.]  The largest 10-digit pyramidal number (sum of all squares of integers from 1 to 3106): 9,992,929,141 = 12+22+…+31052+31062.

9,993,948,264

[Math.]  The largest 10-digit cube number = 2,1543.

9,995,200,576

[Math.]  (Sequence of numbers (10n–24), n ³ 3).

99,9762 = 9,995,200,5762 (and the 3rd and 4th powers).

9,997,800,121

[Math.]  (Sequence of numbers (10n–11), n ³ 3).

9,997,800,121 = (99978+0012–1)2 = 999892.

9,998,000,100

[Math.]  (Sequence of numbers (10n–10m, n > 2m).

9,998,000,100 = (99980+00+10+0)2 = 999902.

9,998,200,081

[Math.]  (Sequence of numbers (10n–9), n ³ 2)

9,998,200,081 = (99982+0+0+0+8+1)2 = 99,9912.

9,999,000,025

[Math.]  99,9952 = 9,999,000,025.

9,999,200,016

[Math.]  99,9962 = 9,999,200,016.

9,999,800,001

[Math.]  9,999,800,001 = (99998+00001)2 = 99,9992. The largest 10-digit square number.

9,999,878,910

[Math.]  The largest 10-digit triangular number (sum of all integers from 1 to 141420): 9,999,878,910 = 1+2+…+141419+141420.

9,999,899,999

[Math.]  The reciprocal of numbers in the series 89, 9899, 998999… (i.e, of the form (102n–10n–1), for n ³ 1) contains n rightmost digit of the first nth Fibonacci numbers up to the second biggest n-digit Fibonacci number: 1/9,999,899,999 =

= 0.00000.0000100001000020000300005000080001300021.

9,999,900,000s (separate page)

9,999,999,999 (separate page)

x,yzw,abc,def

[Math.]  For any x,yzw = 1000 to 9999, there are always six 6-digit numbers abc,edf such that x,yzw +abc,def is equal to one of 6 digit-rotations of 142,857 and the number x,yzw,abc,def is a multiple of 142,857.

For any x,yzw = 1000 to 9999, there are always twelve 6-digit numbers abc,edf such that x,yzw +abc,def is equal to one of 12 digit-rotations of 076,923 or 153,846 and the number x,yzw,abc,def is a multiple of 76,923.