81814512672

Names of 81814512672

• Cardinal: 81814512672 can be written as Eighty-one billion, eight hundred fourteen million, five hundred twelve thousand, six hundred seventy-two.

Scientific notation

• Scientific notation: 8.1814512672 × 10¹⁰

Factors of 81814512672

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 31564246

Divisors of 81814512672

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 27 32 36 48 54 72 81 96 108 144 162 216 288 324 432 648 864 1296 2592 31564241 63128482 94692723 126256964 189385446 252513928 284078169 378770892 505027856 568156338 757541784 852234507 1010055712 1136312676 1515083568 1704469014 2272625352 2556703521 3030167136 3408938028 4545250704 5113407042 6817876056 9090501408 10226814084 13635752112 20453628168 27271504224 40907256336 81814512672
• Sum of all divisors σ(n): 240614216766
• Sum of proper divisors (its aliquot sum) s(n): 158799704094
• 81814512672 is an abundant number, because the sum of its proper divisors (158799704094) is greater than itself. Its abundance is 76985191422

Bases of 81814512672

• Binary: 1001100001100100001100110010000100000₂
• Hexadecimal: 0x130C866420
• Base-36: 11L28Y00

Squares and roots of 81814512672

• 81814512672 squared (81814512672²) is 6693614483756848579584
• 81814512672 cubed (81814512672³) is 547634807002807426281160368488448
• The square root of 81814512672 is 286032.3629801355
• The cube root of 81814512672 is 4341.2032148497

Scales and comparisons

• 81,814,512,672 seconds is equal to 2,601 years, 23 weeks, 2 days, 5 hours, 31 minutes, 12 seconds.
• To count from 1 to 81,814,512,672 would take you about five thousand, two hundred 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 81814512672 cubic inches would be around 361.8 feet tall.

Recreational maths with 81814512672

• 81814512672 backwards is 27621541818
• The number of decimal digits it has is: 11
• The sum of 81814512672's digits is 45
• More coming soon!