81620319040

Names of 81620319040

• Cardinal: 81620319040 can be written as Eighty-one billion, six hundred twenty million, three hundred nineteen thousand and forty.

Scientific notation

• Scientific notation: 8.162031904 × 10¹⁰

Factors of 81620319040

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 6479

Divisors of 81620319040

• Number of divisors d(n): 224
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 26 29 32 40 52 58 64 65 80 104 107 116 130 145 160 208 214 232 260 290 320 377 416 428 464 520 535 580 754 832 856 928 1040 1070 1160 1391 1508 1712 1856 1885 2080 2140 2320 2782 3016 3103 3424 3770 4160 4280 4640 5564 6032 6206 6323 6848 6955 7540 8560 9280 11128 12064 12412 12646 13910 15080 15515 17120 22256 24128 24824 25292 27820 30160 31030 31615 34240 40339 44512 49648 50584 55640 60320 62060 63230 80678 82199 89024 99296 101168 111280 120640 124120 126460 161356 164398 183367 198592 201695 202336 222560 248240 252920 322712 328796 366734 403390 404672 410995 445120 496480 505840 645424 657592 676561 733468 806780 821990 916835 992960 1011680 1290848 1315184 1353122 1466936 1613560 1643980 1833670 2023360 2383771 2581696 2630368 2706244 2933872 3227120 3287960 3382805 3667340 4767542 5260736 5412488 5867744 6454240 6575920 6765610 7334680 8795293 9535084 10824976 11735488 11918855 12908480 13151840 13531220 14669360 17590586 19070168 19620269 21649952 23837710 26303680 27062440 29338720 35181172 38140336 39240538 43299904 43976465 47675420 54124880 58677440 70362344 76280672 78481076 87952930 95350840 98101345 108249760 140724688 152561344 156962152 175905860 190701680 196202690 216499520 255063497 281449376 313924304 351811720 381403360 392405380 510126994 562898752 627848608 703623440 762806720 784810760 1020253988 1255697216 1275317485 1407246880 1569621520 2040507976 2550634970 2814493760 3139243040 4081015952 5101269940 6278486080 8162031904 10202539880 16324063808 20405079760 40810159520 81620319040
• Sum of all divisors σ(n): 218584759680
• Sum of proper divisors (its aliquot sum) s(n): 136964440640
• 81620319040 is an abundant number, because the sum of its proper divisors (136964440640) is greater than itself. Its abundance is 55344121600

Bases of 81620319040

• Binary: 1001100000000111100110011101101000000₂
• Hexadecimal: 0x1300F33B40
• Base-36: 11HUMP8G

Squares and roots of 81620319040

• 81620319040 squared (81620319040²) is 6661876480191386521600
• 81620319040 cubed (81620319040³) is 543744483718293208152947851264000
• The square root of 81620319040 is 285692.7003617699
• The cube root of 81620319040 is 4337.7657566407

Scales and comparisons

• 81,620,319,040 seconds is equal to 2,595 years, 14 weeks, 1 day, 14 hours, 50 minutes, 40 seconds.
• To count from 1 to 81,620,319,040 would take you about five thousand, one hundred ninety 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 81620319040 cubic inches would be around 361.5 feet tall.

Recreational maths with 81620319040

• 81620319040 backwards is 04091302618
• The number of decimal digits it has is: 11
• The sum of 81620319040's digits is 34
• More coming soon!