138801698721

Names of 138801698721

• Cardinal: 138801698721 can be written as One hundred thirty-eight billion, eight hundred one million, six hundred ninety-eight thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 1.38801698721 × 10¹¹

Factors of 138801698721

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 280

Divisors of 138801698721

• Number of divisors d(n): 81
• Complete list of divisors:
  1 3 7 9 21 49 63 113 147 157 339 441 471 791 1017 1099 1413 2373 3297 5537 7119 7693 9891 12769 16611 17741 23079 24649 38307 49833 53223 69237 73947 89383 114921 124187 159669 172543 221841 268149 372561 517629 625681 804447 869309 1117683 1207801 1552887 1877043 2004733 2607927 2785337 3623403 5631129 6014199 7823781 8356011 10870209 14033131 18042597 19497359 25068033 42099393 58492077 98231917 126298179 136481513 175476231 294695751 314743081 409444539 884087253 944229243 1228333617 2203201567 2832687729 6609604701 15422410969 19828814103 46267232907 138801698721
• Sum of all divisors σ(n): 236815138521
• Sum of proper divisors (its aliquot sum) s(n): 98013439800
• 138801698721 is a deficient number, because the sum of its proper divisors (98013439800) is less than itself. Its deficiency is 40788258921

Bases of 138801698721

• Binary: 10000001010001001110011101011110100001₂
• Hexadecimal: 0x205139D7A1
• Base-36: 1RRIY469

Squares and roots of 138801698721

• 138801698721 squared (138801698721²) is 19265911567835253035841
• 138801698721 cubed (138801698721³) is 2674141253024097546043603096859361
• 138801698721 is a perfect square number. Its square root is 372561
• The cube root of 138801698721 is 5177.6369359147

Scales and comparisons

• 138,801,698,721 seconds is equal to 4,413 years, 24 weeks, 1 day, 3 hours, 25 minutes, 21 seconds.
• To count from 1 to 138,801,698,721 would take you about eight thousand, eight hundred twenty-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 138801698721 cubic inches would be around 431.5 feet tall.

Recreational maths with 138801698721

• 138801698721 backwards is 127896108831
• The number of decimal digits it has is: 12
• The sum of 138801698721's digits is 54
• More coming soon!