640665831168

Names of 640665831168

• Cardinal: 640665831168 can be written as Six hundred forty billion, six hundred sixty-five million, eight hundred thirty-one thousand, one hundred sixty-eight.

Scientific notation

• Scientific notation: 6.40665831168 × 10¹¹

Factors of 640665831168

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 31019

Divisors of 640665831168

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 16 18 19 22 24 32 33 36 38 43 44 48 57 64 66 72 76 86 88 96 99 114 128 129 132 144 152 171 172 176 192 198 209 228 256 258 264 288 304 342 344 352 384 387 396 418 456 473 516 528 576 608 627 684 688 704 768 774 792 817 836 912 946 1032 1056 1152 1216 1254 1368 1376 1408 1419 1548 1584 1634 1672 1824 1881 1892 2064 2112 2304 2432 2451 2508 2736 2752 2816 2838 3096 3168 3268 3344 3648 3762 3784 4128 4224 4257 4864 4902 5016 5472 5504 5676 6192 6336 6536 6688 7296 7353 7524 7568 8256 8448 8514 8987 9804 10032 10944 11008 11352 12384 12672 13072 13376 14592 14706 15048 15136 16512 17028 17974 19608 20064 21888 22704 24768 25344 26144 26752 26961 29412 30096 30272 30941 33024 34056 35948 39216 40128 43776 45408 49536 52288 53504 53922 58824 60192 60544 61882 68112 71896 78432 80256 80883 90816 92823 99072 104576 107844 117648 120384 121088 123764 136224 143792 156864 160512 161766 181632 185646 209152 215688 235296 240768 247528 272448 278469 287584 313728 323532 340351 363264 371292 431376 470592 481536 495056 544896 556938 575168 587879 627456 647064 680702 742584 862752 941184 990112 1021053 1089792 1113876 1150336 1175758 1294128 1330463 1361404 1485168 1725504 1763637 1882368 1980224 2042106 2227752 2300672 2351516 2588256 2660926 2722808 2970336 3063159 3451008 3527274 3960448 3991389 4084212 4455504 4703032 5176512 5290911 5321852 5445616 5940672 6126318 6466669 6902016 7054548 7920896 7982778 8168424 8911008 9406064 10353024 10581822 10643704 10891232 11881344 11974167 12252636 12933338 14109096 14635093 15965556 16336848 17822016 18812128 19400007 20706048 21163644 21287408 21782464 23762688 23948334 24505272 25278797 25866676 28218192 29270186 31931112 32673696 35644032 37624256 38800014 42327288 42574816 43564928 43905279 47896668 49010544 50557594 51733352 56436384 58200021 58540372 63862224 65347392 71288064 75248512 75836391 77600028 84654576 85149632 87129856 87810558 95793336 98021088 101115188 103466704 112872768 116400042 117080744 127724448 130694784 131715837 150497024 151672782 155200056 169309152 170299264 175621116 191586672 196042176 202230376 206933408 225745536 227509173 232800084 234161488 255448896 261389568 263431674 278066767 303345564 310400112 338618304 340598528 351242232 383173344 392084352 404460752 413866816 451491072 455018346 465600168 468322976 510897792 526863348 556133534 606691128 620800224 677236608 702484464 766346688 784168704 808921504 827733632 834200301 910036692 931200336 936645952 1021795584 1053726696 1112267068 1213382256 1241600448 1354473216 1404968928 1532693376 1617843008 1655467264 1668400602 1820073384 1862400672 1873291904 2107453392 2224534136 2426764512 2483200896 2502600903 2809937856 3065386752 3235686016 3336801204 3640146768 3724801344 3746583808 4214906784 4449068272 4853529024 4966401792 5005201806 5619875712 6471372032 6673602408 7280293536 7449602688 8429813568 8898136544 9707058048 10010403612 11239751424 13347204816 14560587072 14899205376 16859627136 17796273088 19414116096 20020807224 26694409632 29121174144 33719254272 35592546176 40041614448 53388819264 58242348288 71185092352 80083228896 106777638528 160166457792 213555277056 320332915584 640665831168
• Sum of all divisors σ(n): 2170583775360
• Sum of proper divisors (its aliquot sum) s(n): 1529917944192
• 640665831168 is an abundant number, because the sum of its proper divisors (1529917944192) is greater than itself. Its abundance is 889252113024

Bases of 640665831168

• Binary: 1001010100101010101010001100011100000000₂
• Hexadecimal: 0x952AA8C700
• Base-36: 86BFW740

Squares and roots of 640665831168

• 640665831168 squared (640665831168²) is 410452707226184280244224
• 640665831168 cubed (640665831168³) is 262963024830219111675801610991173632
• The square root of 640665831168 is 800416.0363011225
• The cube root of 640665831168 is 8620.7262446919

Scales and comparisons

• 640,665,831,168 seconds is equal to 20,371 years, 9 weeks, 6 days, 18 hours, 52 minutes, 48 seconds.
• To count from 1 to 640,665,831,168 would take you about forty thousand, seven hundred forty-two 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 640665831168 cubic inches would be around 718.4 feet tall.

Recreational maths with 640665831168

• 640665831168 backwards is 861138566046
• The number of decimal digits it has is: 12
• The sum of 640665831168's digits is 54
• More coming soon!