Number 9,999,999,999

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 ...

Back to [Numbers 9,900,000,000s] & [Numbers 9,999,900,000s]

[Math.]   The largest 10-digit number.

[Math.]   Its odd powers end with 9,999,999,999. Its even powers end with 0,000,000,001.

[Math.]   9,999,999,9992 = 99,999,999,980,000,000,001  =

=  (9,999,999,998+0,000,000,001)2.

[Math.]

1,111,111,1113 = 1371742112071330589890260631 and 13717421+1207133058+9890260631 = 11,111,111,110 and 1+1,111,111,110 = 1,111,111,111.

2,222,222,2223 = 10973936896570644719122085048 and    109739368+9657064471+9122085048 = 18,888,888,887 and 1+8,888,888,887 = 8,888,888,888.

3,333,333,3333 = 37,037,037,025,925,925,927,037,037,037 = (370,370,370+2,592,592,592+7,037,037,037)3

4,444,444,4443 = 87791495172565157752976680384 and 877914951+7256515775+2976680384 = 11,111,111,110 and 1+1,111,111,110 = 1,111,111,111.

5,555,555,5553 = 171467764008916323736282578875 and 1714677640+0891632373+6282578875 = 8,888,888,888.

6,666,666,6663 = 296296296207407407416296296296 =  (2962962962+0740740741+6296296296)3.

7,777,777,7773 = 470507544440466392332359396433 and  4705075444+4046639233+2359396433 = 11,111,111,110 and 1+1,111,111,110 = 1,111,111,111.

8,888,888,8883 = 702331961380521262023813443072 and   7023319613+8052126202+3813443072 = 18,888,888,887 and 1+8,888,888,887 = 8,888,888,888.

9,999,999,9993 = 999,999,999,700,000,000,029,999,999,999

and  9,999,999,997+0,000,000,002+9,999,999,999 = 2×9,999,999,999.

[Trivia]  The largest 10-digit number or the maximum number that can be displayed by a 10-digit counter.

91--99 & 991--999 & ...  & 999,999,991--999,999,999 &

9,999,999,991--9,999,999,999

[Math.]   Repeatedly inserting number 9 before ab and number 0 before cd in the square number abcd = (9x)2 yields the square numbers: (99x)2 = 9ab0cd; (999x)2 = 99ab00cd…, for x = 1 to 9.