640145372949420

Names of 640145372949420

• Cardinal: 640145372949420 can be written as Six hundred forty trillion, one hundred forty-five billion, three hundred seventy-two million, nine hundred forty-nine thousand, four hundred twenty.

Scientific notation

• Scientific notation: 6.4014537294942 × 10¹⁴

Factors of 640145372949420

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1878030262

Divisors of 640145372949420

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 10 12 13 15 19 20 23 26 30 38 39 46 52 57 60 65 69 76 78 92 95 114 115 130 138 156 190 195 228 230 247 260 276 285 299 345 380 390 437 460 494 570 598 690 741 780 874 897 988 1140 1196 1235 1311 1380 1482 1495 1748 1794 2185 2470 2622 2964 2990 3588 3705 4370 4485 4940 5244 5681 5980 6555 7410 8740 8970 11362 13110 14820 17043 17940 22724 26220 28405 34086 56810 68172 85215 113620 170430 340860 1878030197 3756060394 5634090591 7512120788 9390150985 11268181182 18780301970 22536362364 24414392561 28170452955 35682573743 37560603940 43194694531 48828785122 56340905910 71365147486 73243177683 86389389062 97657570244 107047721229 112681811820 122071962805 129584083593 142730294972 146486355366 172778778124 178412868715 214095442458 215973472655 244143925610 259168167186 292972710732 356825737430 366215888415 428190884916 431946945310 463873458659 488287851220 518336334372 535238606145 561531028903 647920417965 713651474860 732431776830 820699196089 863893890620 927746917318 1070477212290 1123062057806 1295840835930 1391620375977 1464863553660 1641398392178 1684593086709 1855493834636 2140954424580 2246124115612 2319367293295 2462097588267 2591681671860 2783240751954 2807655144515 3282796784356 3369186173418 4103495980445 4638734586590 4924195176534 5566481503908 5615310289030 6738372346836 6958101879885 8206991960890 8422965433545 9277469173180 9848390353068 10669089549157 11230620578060 12310487941335 13916203759770 16413983921780 16845930867090 21338179098314 24620975882670 27832407519540 32007268647471 33691861734180 42676358196628 49241951765340 53345447745785 64014537294942 106690895491570 128029074589884 160036343237355 213381790983140 320072686474710 640145372949420
• Sum of all divisors σ(n): 2120220972334080
• Sum of proper divisors (its aliquot sum) s(n): 1480075599384660
• 640145372949420 is an abundant number, because the sum of its proper divisors (1480075599384660) is greater than itself. Its abundance is 839930226435240

Bases of 640145372949420

• Binary: 10010001100011010101110101100011110010101110101100₂
• Hexadecimal: 0x24635758F2BAC
• Base-36: 6AWUQ2ZNHO

Squares and roots of 640145372949420

• 640145372949420 squared (640145372949420²) is 409786098508552023069878336400
• 640145372949420 cubed (640145372949420³) is 262322674859244797635409311392523030944888000
• The square root of 640145372949420 is 25301094.3033976299
• The cube root of 640145372949420 is 86183.9120349111

Scales and comparisons

• 640,145,372,949,420 seconds is equal to 20,354,642 years, 39 weeks, 3 days, 16 hours, 37 minutes.
• To count from 1 to 640,145,372,949,420 would take you about fifty million, eight hundred eighty-six thousand, six hundred six 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 640145372949420 cubic inches would be around 7182 feet tall.

Recreational maths with 640145372949420

• 640145372949420 backwards is 024949273541046
• 640145372949420 is a Harshad number.
• The number of decimal digits it has is: 15
• The sum of 640145372949420's digits is 60
• More coming soon!