31981139396791

Names of 31981139396791

• Cardinal: 31981139396791 can be written as Thirty-one trillion, nine hundred eighty-one billion, one hundred thirty-nine million, three hundred ninety-six thousand, seven hundred ninety-one.

Scientific notation

• Scientific notation: 3.1981139396791 × 10¹³

Factors of 31981139396791

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 9624

Divisors of 31981139396791

• Number of divisors d(n): 64
• Complete list of divisors:
  1 13 19 31 247 313 403 589 1789 4069 5947 7459 7657 9703 23257 33991 55459 77311 96967 126139 141721 184357 231229 441883 559957 720967 1053721 1842373 2334667 2396641 3005977 4393351 7279441 10639183 13344151 13698373 17358667 30350671 44358673 57113563 72374677 138309379 173473963 225662671 253538869 329814673 413668681 576662749 940870801 1375118863 3296005297 4176719263 4287590749 5377692853 7859704939 17876545219 54297350419 79357665997 102176164207 129478297153 1031649657961 1683217862989 2460087645907 31981139396791
• Sum of all divisors σ(n): 37568989696000
• Sum of proper divisors (its aliquot sum) s(n): 5587850299209
• 31981139396791 is a deficient number, because the sum of its proper divisors (5587850299209) is less than itself. Its deficiency is 26393289097582

Bases of 31981139396791

• Binary: 111010001011000110000011101000000100010110111₂
• Hexadecimal: 0x1D16307408B7
• Base-36: BC3XKO247

Squares and roots of 31981139396791

• 31981139396791 squared (31981139396791²) is 1022793277116977407341097681
• 31981139396791 cubed (31981139396791³) is 32710094369578740944557847784920148941671
• The square root of 31981139396791 is 5655186.9462283031
• The cube root of 31981139396791 is 31741.7824507551

Scales and comparisons

• 31,981,139,396,791 seconds is equal to 1,016,901 years, 16 weeks, 8 hours, 26 minutes, 31 seconds.
• To count from 1 to 31,981,139,396,791 would take you about two million, five hundred forty-two thousand, two hundred fifty-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 31981139396791 cubic inches would be around 2645.1 feet tall.

Recreational maths with 31981139396791

• 31981139396791 backwards is 19769393118913
• The number of decimal digits it has is: 14
• The sum of 31981139396791's digits is 70
• More coming soon!