81328272144

Names of 81328272144

• Cardinal: 81328272144 can be written as Eighty-one billion, three hundred twenty-eight million, two hundred seventy-two thousand, one hundred forty-four.

Scientific notation

• Scientific notation: 8.1328272144 × 10¹⁰

Factors of 81328272144

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1819944

Divisors of 81328272144

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 16 19 21 24 28 38 42 48 49 56 57 76 84 98 112 114 133 147 152 168 196 228 266 294 304 336 392 399 456 532 588 784 798 912 931 1064 1176 1596 1862 2128 2352 2793 3192 3724 5586 6384 7448 11172 14896 22344 44688 1819913 3639826 5459739 7279652 10919478 12739391 14559304 21838956 25478782 29118608 34578347 38218173 43677912 50957564 69156694 76436346 87355824 89175737 101915128 103735041 138313388 152872692 178351474 203830256 207470082 242048429 267527211 276626776 305745384 356702948 414940164 484096858 535054422 553253552 611490768 713405896 726145287 829880328 968193716 1070108844 1426811792 1452290574 1659760656 1694339003 1936387432 2140217688 2904581148 3388678006 3872774864 4280435376 5083017009 5809162296 6777356012 10166034018 11618324592 13554712024 20332068036 27109424048 40664136072 81328272144
• Sum of all divisors σ(n): 257263043040
• Sum of proper divisors (its aliquot sum) s(n): 175934770896
• 81328272144 is an abundant number, because the sum of its proper divisors (175934770896) is greater than itself. Its abundance is 94606498752

Bases of 81328272144

• Binary: 1001011101111100010101111001100010000₂
• Hexadecimal: 0x12EF8AF310
• Base-36: 11D0R4EO

Squares and roots of 81328272144

• 81328272144 squared (81328272144²) is 6614287849928526356736
• 81328272144 cubed (81328272144³) is 537928602297739822489502235561984
• The square root of 81328272144 is 285181.1216472787
• The cube root of 81328272144 is 4332.5858986259

Scales and comparisons

• 81,328,272,144 seconds is equal to 2,585 years, 51 weeks, 2 days, 10 hours, 42 minutes, 24 seconds.
• To count from 1 to 81,328,272,144 would take you about five thousand, one hundred seventy-one 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 81328272144 cubic inches would be around 361 feet tall.

Recreational maths with 81328272144

• 81328272144 backwards is 44127282318
• 81328272144 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81328272144's digits is 42
• More coming soon!