Numbers 640,000,000,000s

640,004,800,009

[Math.]  (Sequence of numbers 80…032 = 640…0480…09).

800,0032 = 640,004,800,009 = (–6+4–0004+800009)2 

 

640,008,000,025

[Math.]  (Sequence of numbers 80…052 = 640…080…025).

800,0052 = 640,008,000,025 = (–6+4+000+800002+5)2.

 

641,192,555,025   

[Math.]   Sum of the first 1265 cube numbers:

13+…+12653 = 641,192,555,02 = (1+…+1265)2 = 800,7452.

 

643,221,644,121   

[Math.]   Sum of the first 1266 cube numbers:

13+…+12663 = 643,221,644,121 = (1+…+1266)2 = 802,0112.

 

645,255,545,284   

[Math.]   Sum of the first 1267 cube numbers:

13+…+12673 = 645,255,545,284 = (1+…+1267)2 = 803,2782.

 

647,189,116,175

[Math.]   Two consecutive sums of consecutive square numbers:

647,189,116,175 = 607262+…+609002 = 609012+…+610742.

 

647,294,266,116   

[Math.]   Sum of the first 1268 cube numbers:

13+…+12683 = 647,294,266,116 = (1+…+1268)2 = 804,5462.

 

649,337,814,225   

[Math.]    Sum of the first 1269 cube numbers:

13+…+12693 = 649,337,814,225 = (1+…+1269)2 = 805,8152.