81829153720

Names of 81829153720

• Cardinal: 81829153720 can be written as Eighty-one billion, eight hundred twenty-nine million, one hundred fifty-three thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 8.182915372 × 10¹⁰

Factors of 81829153720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 132784

Divisors of 81829153720

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 4 5 8 10 20 31 40 62 124 155 248 310 499 620 998 1240 1996 2495 3992 4990 9980 15469 19960 30938 61876 77345 123752 132247 154690 264494 309380 528988 618760 661235 1057976 1322470 2644940 4099657 5289880 8199314 16398628 20498285 32797256 40996570 65991253 81993140 131982506 163986280 263965012 329956265 527930024 659912530 1319825060 2045728843 2639650120 4091457686 8182915372 10228644215 16365830744 20457288430 40914576860 81829153720
• Sum of all divisors σ(n): 190437120000
• Sum of proper divisors (its aliquot sum) s(n): 108607966280
• 81829153720 is an abundant number, because the sum of its proper divisors (108607966280) is greater than itself. Its abundance is 26778812560

Bases of 81829153720

• Binary: 1001100001101011001011100101110111000₂
• Hexadecimal: 0x130D65CBB8
• Base-36: 11LAYR3S

Squares and roots of 81829153720

• 81829153720 squared (81829153720²) is 6696010398531389838400
• 81829153720 cubed (81829153720³) is 547928864212143561331679558848000
• The square root of 81829153720 is 286057.9551769187
• The cube root of 81829153720 is 4341.4621582063

Scales and comparisons

• 81,829,153,720 seconds is equal to 2,601 years, 47 weeks, 3 days, 16 hours, 28 minutes, 40 seconds.
• To count from 1 to 81,829,153,720 would take you about five thousand, two hundred three 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 81829153720 cubic inches would be around 361.8 feet tall.

Recreational maths with 81829153720

• 81829153720 backwards is 02735192818
• The number of decimal digits it has is: 11
• The sum of 81829153720's digits is 46
• More coming soon!