640402976768

Names of 640402976768

• Cardinal: 640402976768 can be written as Six hundred forty billion, four hundred two million, nine hundred seventy-six thousand, seven hundred sixty-eight.

Scientific notation

• Scientific notation: 6.40402976768 × 10¹¹

Factors of 640402976768

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 4083

Divisors of 640402976768

• Number of divisors d(n): 104
• Complete list of divisors:
  1 2 4 8 16 32 64 97 128 194 256 388 457 512 776 914 1024 1552 1828 2048 3104 3527 3656 4096 6208 7054 7312 12416 14108 14624 24832 28216 29248 44329 49664 56432 58496 88658 99328 112864 116992 177316 198656 225728 233984 342119 354632 397312 451456 467968 684238 709264 902912 935936 1368476 1418528 1611839 1805824 1871872 2736952 2837056 3223678 3611648 5473904 5674112 6447356 7223296 10947808 11348224 12894712 14446592 21895616 22696448 25789424 43791232 45392896 51578848 87582464 90785792 103157696 156348383 175164928 181571584 206315392 312696766 350329856 412630784 625393532 700659712 825261568 1250787064 1401319424 1650523136 2501574128 3301046272 5003148256 6602092544 10006296512 20012593024 40025186048 80050372096 160100744192 320201488384 640402976768
• Sum of all divisors σ(n): 1297051009632
• Sum of proper divisors (its aliquot sum) s(n): 656648032864
• 640402976768 is an abundant number, because the sum of its proper divisors (656648032864) is greater than itself. Its abundance is 16245056096

Bases of 640402976768

• Binary: 1001010100011010111111011111000000000000₂
• Hexadecimal: 0x951AFDF000
• Base-36: 8673EBCW

Squares and roots of 640402976768

• 640402976768 squared (640402976768²) is 410115972653315547725824
• 640402976768 cubed (640402976768³) is 262639489707286960028434062305656832
• The square root of 640402976768 is 800251.8208464133
• The cube root of 640402976768 is 8619.5471038225

Scales and comparisons

• 640,402,976,768 seconds is equal to 20,362 years, 43 weeks, 2 days, 11 hours, 46 minutes, 8 seconds.
• To count from 1 to 640,402,976,768 would take you about forty thousand, seven hundred twenty-five years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 640402976768 cubic inches would be around 718.3 feet tall.

Recreational maths with 640402976768

• 640402976768 backwards is 867679204046
• The number of decimal digits it has is: 12
• The sum of 640402976768's digits is 59
• More coming soon!