16399619721

Names of 16399619721

• Cardinal: 16399619721 can be written as Sixteen billion, three hundred ninety-nine million, six hundred nineteen thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 1.6399619721 × 10¹⁰

Factors of 16399619721

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 51

Divisors of 16399619721

• Number of divisors d(n): 99
• Complete list of divisors:
  1 3 9 17 27 31 51 81 93 153 243 279 289 459 527 729 837 867 961 1377 1581 2187 2511 2601 2883 4131 4743 6561 7533 7803 8649 8959 12393 14229 16337 19683 22599 23409 25947 26877 37179 42687 49011 59049 67797 70227 77841 80631 111537 128061 147033 203391 210681 233523 241893 277729 334611 384183 441099 610173 632043 700569 725679 833187 1003833 1152549 1323297 1830519 1896129 2101707 2177037 2499561 3457647 3969891 5688387 6305121 6531111 7498683 10372941 11909673 17065161 18915363 19593333 22496049 31118823 35729019 56746089 58779999 67488147 107187057 176339997 202464441 321561171 529019991 607393323 964683513 1822179969 5466539907 16399619721
• Sum of all divisors σ(n): 27001567623
• Sum of proper divisors (its aliquot sum) s(n): 10601947902
• 16399619721 is a deficient number, because the sum of its proper divisors (10601947902) is less than itself. Its deficiency is 5797671819

Bases of 16399619721

• Binary: 1111010001011111100101011010001001₂
• Hexadecimal: 0x3D17E5689
• Base-36: 7J7WRK9

Squares and roots of 16399619721

• 16399619721 squared (16399619721²) is 268947526993412117841
• 16399619721 cubed (16399619721³) is 4410637167595341204825639542361
• 16399619721 is a perfect square number. Its square root is 128061
• The cube root of 16399619721 is 2540.6485479387

Scales and comparisons

• 16,399,619,721 seconds is equal to 521 years, 23 weeks, 5 days, 9 hours, 55 minutes, 21 seconds.
• To count from 1 to 16,399,619,721 would take you about one thousand and forty-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 16399619721 cubic inches would be around 211.7 feet tall.

Recreational maths with 16399619721

• 16399619721 backwards is 12791699361
• The number of decimal digits it has is: 11
• The sum of 16399619721's digits is 54
• More coming soon!