15991990935987

Names of 15991990935987

• Cardinal: 15991990935987 can be written as Fifteen trillion, nine hundred ninety-one billion, nine hundred ninety million, nine hundred thirty-five thousand, nine hundred eighty-seven.

Scientific notation

• Scientific notation: 1.5991990935987 × 10¹³

Factors of 15991990935987

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 11080

Divisors of 15991990935987

• Number of divisors d(n): 54
• Complete list of divisors:
  1 3 11 19 33 57 121 209 361 363 627 1083 2299 3971 6897 11047 11913 33141 43681 121517 131043 209893 364551 629679 1336687 2308823 3987967 4010061 6926469 11963901 25397053 43867637 76191159 122036209 131602911 366108627 482544007 1342398299 1447632021 2318687971 4027194897 6956063913 14766381289 25505567681 44055071449 44299143867 76516703043 132165214347 280561244491 484605785939 841683733473 1453817357817 5330663645329 15991990935987
• Sum of all divisors σ(n): 24738002615844
• Sum of proper divisors (its aliquot sum) s(n): 8746011679857
• 15991990935987 is a deficient number, because the sum of its proper divisors (8746011679857) is less than itself. Its deficiency is 7245979256130

Bases of 15991990935987

• Binary: 11101000101101101100111100000110000110110011₂
• Hexadecimal: 0xE8B6CF061B3
• Base-36: 5O2MAI303

Squares and roots of 15991990935987

• 15991990935987 squared (15991990935987²) is 255743774096690364331664169
• 15991990935987 cubed (15991990935987³) is 4089852117289379224927254113707660549803
• The square root of 15991990935987 is 3998998.7416835979
• The cube root of 15991990935987 is 25194.2158010175

Scales and comparisons

• 15,991,990,935,987 seconds is equal to 508,495 years, 43 weeks, 6 days, 16 hours, 26 minutes, 27 seconds.
• To count from 1 to 15,991,990,935,987 would take you about one million, two hundred seventy-one thousand, two hundred thirty-nine 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 15991990935987 cubic inches would be around 2099.5 feet tall.

Recreational maths with 15991990935987

• 15991990935987 backwards is 78953909919951
• The number of decimal digits it has is: 14
• The sum of 15991990935987's digits is 84
• More coming soon!