81350128832720

Names of 81350128832720

• Cardinal: 81350128832720 can be written as Eighty-one trillion, three hundred fifty billion, one hundred twenty-eight million, eight hundred thirty-two thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 8.135012883272 × 10¹³

Factors of 81350128832720

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 91691

Divisors of 81350128832720

• Number of divisors d(n): 90
• Complete list of divisors:
  1 2 4 5 8 10 11 16 20 22 40 44 55 80 88 110 121 176 220 242 440 484 605 880 968 1210 1936 2420 4840 9680 91673 183346 366692 458365 733384 916730 1008403 1466768 1833460 2016806 3666920 4033612 5042015 7333840 8067224 10084030 11092433 16134448 20168060 22184866 40336120 44369732 55462165 80672240 88739464 110924330 177478928 221848660 443697320 887394640 8403938929 16807877858 33615755716 42019694645 67231511432 84039389290 92443328219 134463022864 168078778580 184886656438 336157557160 369773312876 462216641095 672315114320 739546625752 924433282190 1016876610409 1479093251504 1848866564380 2033753220818 3697733128760 4067506441636 5084383052045 7395466257520 8135012883272 10168766104090 16270025766544 20337532208180 40675064416360 81350128832720
• Sum of all divisors σ(n): 207898909057014
• Sum of proper divisors (its aliquot sum) s(n): 126548780224294
• 81350128832720 is an abundant number, because the sum of its proper divisors (126548780224294) is greater than itself. Its abundance is 45198651391574

Bases of 81350128832720

• Binary: 10010011111110011001101100010000001000011010000₂
• Hexadecimal: 0x49FCCD8810D0
• Base-36: SU3QEB4CW

Squares and roots of 81350128832720

• 81350128832720 squared (81350128832720²) is 6617843461100141869742598400
• 81350128832720 cubed (81350128832720³) is 538362418155270168849029844664651739648000
• The square root of 81350128832720 is 9019430.6268588817
• The cube root of 81350128832720 is 43329.7398629847

Scales and comparisons

• 81,350,128,832,720 seconds is equal to 2,586,682 years, 24 weeks, 1 day, 1 hour, 5 minutes, 20 seconds.
• To count from 1 to 81,350,128,832,720 would take you about six million, four hundred sixty-six thousand, seven 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 81350128832720 cubic inches would be around 3610.8 feet tall.

Recreational maths with 81350128832720

• 81350128832720 backwards is 02723882105318
• The number of decimal digits it has is: 14
• The sum of 81350128832720's digits is 50
• More coming soon!