640537536440

Names of 640537536440

• Cardinal: 640537536440 can be written as Six hundred forty billion, five hundred thirty-seven million, five hundred thirty-six thousand, four hundred forty.

Scientific notation

• Scientific notation: 6.4053753644 × 10¹¹

Factors of 640537536440

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 6621

Divisors of 640537536440

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 8 10 20 40 109 151 157 218 302 314 436 545 604 628 755 785 872 1090 1208 1256 1510 1570 2180 3020 3140 4360 6040 6197 6280 12394 16459 17113 23707 24788 30985 32918 34226 47414 49576 61970 65836 68452 82295 85565 94828 118535 123940 131672 136904 164590 171130 189656 237070 247880 329180 342260 474140 658360 675473 684520 935747 948280 972929 1350946 1871494 1945858 2584063 2701892 3377365 3742988 3891716 4678735 4864645 5168126 5403784 6754730 7485976 7783432 9357470 9729290 10336252 12920315 13509460 18714940 19458580 20672504 25840630 27018920 37429880 38917160 51681260 101996423 103362520 106049261 146912279 203992846 212098522 293824558 407985692 424197044 509982115 530246305 587649116 734561395 815971384 848394088 1019964230 1060492610 1175298232 1469122790 2039928460 2120985220 2938245580 4079856920 4241970440 5876491160 16013438411 32026876822 64053753644 80067192055 128107507288 160134384110 320268768220 640537536440
• Sum of all divisors σ(n): 1473626563200
• Sum of proper divisors (its aliquot sum) s(n): 833089026760
• 640537536440 is an abundant number, because the sum of its proper divisors (833089026760) is greater than itself. Its abundance is 192551490320

Bases of 640537536440

• Binary: 1001010100100011000000110010011110111000₂
• Hexadecimal: 0x95230327B8
• Base-36: 869BIE9K

Squares and roots of 640537536440

• 640537536440 squared (640537536440²) is 410288335588624327873600
• 640537536440 cubed (640537536440³) is 262805079708005404264806567713984000
• The square root of 640537536440 is 800335.8897612927
• The cube root of 640537536440 is 8620.1507665413

Scales and comparisons

• 640,537,536,440 seconds is equal to 20,367 years, 5 weeks, 5 days, 21 hours, 27 minutes, 20 seconds.
• To count from 1 to 640,537,536,440 would take you about forty thousand, seven hundred thirty-four 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 640537536440 cubic inches would be around 718.3 feet tall.

Recreational maths with 640537536440

• 640537536440 backwards is 044635735046
• The number of decimal digits it has is: 12
• The sum of 640537536440's digits is 47
• More coming soon!