81608920388016

Names of 81608920388016

• Cardinal: 81608920388016 can be written as Eighty-one trillion, six hundred eight billion, nine hundred twenty million, three hundred eighty-eight thousand and sixteen.

Scientific notation

• Scientific notation: 8.1608920388016 × 10¹³

Factors of 81608920388016

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 221004438

Divisors of 81608920388016

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 6 7 8 12 14 16 21 24 28 42 48 49 56 84 98 112 147 157 168 196 294 314 336 392 471 588 628 784 942 1099 1176 1256 1884 2198 2352 2512 3297 3768 4396 6594 7536 7693 8792 13188 15386 17584 23079 26376 30772 46158 52752 61544 92316 123088 184632 369264 221004269 442008538 663012807 884017076 1326025614 1547029883 1768034152 2652051228 3094059766 3536068304 4641089649 5304102456 6188119532 9282179298 10608204912 10829209181 12376239064 18564358596 21658418362 24752478128 32487627543 34697670233 37128717192 43316836724 64975255086 69395340466 74257434384 86633673448 104093010699 129950510172 138790680932 173267346896 208186021398 242883691631 259901020344 277581361864 416372042796 485767383262 519802040688 555162723728 728651074893 832744085592 971534766524 1457302149786 1665488171184 1700185841417 1943069533048 2914604299572 3400371682834 3886139066096 5100557524251 5829208599144 6800743365668 10201115048502 11658417198288 13601486731336 20402230097004 27202973462672 40804460194008 81608920388016
• Sum of all divisors σ(n): 246805192496880
• Sum of proper divisors (its aliquot sum) s(n): 165196272108864
• 81608920388016 is an abundant number, because the sum of its proper divisors (165196272108864) is greater than itself. Its abundance is 83587351720848

Bases of 81608920388016

• Binary: 10010100011100100001110101101011101000110110000₂
• Hexadecimal: 0x4A390EB5D1B0
• Base-36: SXEMC4AEO

Squares and roots of 81608920388016

• 81608920388016 squared (81608920388016²) is 6660015886897533555996416256
• 81608920388016 cubed (81608920388016³) is 543516706296742588539060434786108969988096
• The square root of 81608920388016 is 9033765.5707913961
• The cube root of 81608920388016 is 43375.6381761089

Scales and comparisons

• 81,608,920,388,016 seconds is equal to 2,594,911 years, 12 weeks, 1 day, 16 hours, 13 minutes, 36 seconds.
• To count from 1 to 81,608,920,388,016 would take you about six million, four hundred eighty-seven thousand, two 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 81608920388016 cubic inches would be around 3614.6 feet tall.

Recreational maths with 81608920388016

• 81608920388016 backwards is 61088302980618
• The number of decimal digits it has is: 14
• The sum of 81608920388016's digits is 60
• More coming soon!