81429849424

Names of 81429849424

• Cardinal: 81429849424 can be written as Eighty-one billion, four hundred twenty-nine million, eight hundred forty-nine thousand, four hundred twenty-four.

Scientific notation

• Scientific notation: 8.1429849424 × 10¹⁰

Factors of 81429849424

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 504698

Divisors of 81429849424

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 4 7 8 11 14 16 22 28 44 56 77 88 112 131 154 176 262 308 524 616 917 1048 1232 1441 1834 2096 2882 3668 5764 7336 10087 11528 14672 20174 23056 40348 80696 161392 504547 1009094 2018188 3531829 4036376 5550017 7063658 8072752 11100034 14127316 22200068 28254632 38850119 44400136 56509264 66095657 77700238 88800272 132191314 155400476 264382628 310800952 462669599 528765256 621601904 727052227 925339198 1057530512 1454104454 1850678396 2908208908 3701356792 5089365589 5816417816 7402713584 10178731178 11632835632 20357462356 40714924712 81429849424
• Sum of all divisors σ(n): 198202599936
• Sum of proper divisors (its aliquot sum) s(n): 116772750512
• 81429849424 is an abundant number, because the sum of its proper divisors (116772750512) is greater than itself. Its abundance is 35342901088

Bases of 81429849424

• Binary: 1001011110101100110001110010101010000₂
• Hexadecimal: 0x12F598E550
• Base-36: 11EP89XS

Squares and roots of 81429849424

• 81429849424 squared (81429849424²) is 6630820377215313131776
• 81429849424 cubed (81429849424³) is 539946704874233828747529549697024
• The square root of 81429849424 is 285359.1586474841
• The cube root of 81429849424 is 4334.3889173645

Scales and comparisons

• 81,429,849,424 seconds is equal to 2,589 years, 11 weeks, 2 days, 2 hours, 37 minutes, 4 seconds.
• To count from 1 to 81,429,849,424 would take you about five thousand, one hundred seventy-eight 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 81429849424 cubic inches would be around 361.2 feet tall.

Recreational maths with 81429849424

• 81429849424 backwards is 42494892418
• The number of decimal digits it has is: 11
• The sum of 81429849424's digits is 55
• More coming soon!