81640749580128

Names of 81640749580128

• Cardinal: 81640749580128 can be written as Eighty-one trillion, six hundred forty billion, seven hundred forty-nine million, five hundred eighty thousand, one hundred twenty-eight.

Scientific notation

• Scientific notation: 8.1640749580128 × 10¹³

Factors of 81640749580128

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 78298

Divisors of 81640749580128

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 32 36 48 72 96 144 257 288 514 771 1028 1542 2056 2313 3084 4112 4626 6168 8224 9252 12336 18504 18539 24672 37008 37078 55617 59497 74016 74156 111234 118994 148312 166851 178491 222468 237988 296624 333702 356982 444936 475976 535473 593248 667404 713964 889872 951952 1070946 1334808 1427928 1779744 1903904 2141892 2669616 2855856 4283784 4764523 5339232 5711712 8567568 9529046 14293569 15290729 17135136 19058092 28587138 30581458 38116184 42880707 45872187 57174276 61162916 76232368 85761414 91744374 114348552 122325832 137616561 152464736 171522828 183488748 228697104 244651664 275233122 343045656 366977496 457394208 489303328 550466244 686091312 733954992 1100932488 1103014883 1372182624 1467909984 2201864976 2206029766 3309044649 4403729952 4412059532 6618089298 8824119064 9927133947 13236178596 17648238128 19854267894 26472357192 35296476256 39708535788 52944714384 79417071576 105889428768 158834143152 283474824931 317668286304 566949649862 850424474793 1133899299724 1700848949586 2267798599448 2551273424379 3401697899172 4535597198896 5102546848758 6803395798344 9071194397792 10205093697516 13606791596688 20410187395032 27213583193376 40820374790064 81640749580128
• Sum of all divisors σ(n): 233085740181840
• Sum of proper divisors (its aliquot sum) s(n): 151444990601712
• 81640749580128 is an abundant number, because the sum of its proper divisors (151444990601712) is greater than itself. Its abundance is 69804241021584

Bases of 81640749580128

• Binary: 10010100100000001110111111000001011111101100000₂
• Hexadecimal: 0x4A4077E0BF60
• Base-36: SXT8QEC80

Squares and roots of 81640749580128

• 81640749580128 squared (81640749580128²) is 6665211992005170208292496384
• 81640749580128 cubed (81640749580128³) is 544152903137760210175460798465860958257152
• The square root of 81640749580128 is 9035527.0781580861
• The cube root of 81640749580128 is 43381.2765796217

Scales and comparisons

• 81,640,749,580,128 seconds is equal to 2,595,923 years, 15 weeks, 6 days, 2 hours, 28 minutes, 48 seconds.
• To count from 1 to 81,640,749,580,128 would take you about six million, four hundred eighty-nine thousand, eight hundred 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 81640749580128 cubic inches would be around 3615.1 feet tall.

Recreational maths with 81640749580128

• 81640749580128 backwards is 82108594704618
• The number of decimal digits it has is: 14
• The sum of 81640749580128's digits is 63
• More coming soon!