81689427200

Names of 81689427200

• Cardinal: 81689427200 can be written as Eighty-one billion, six hundred eighty-nine million, four hundred twenty-seven thousand, two hundred.

Scientific notation

• Scientific notation: 8.16894272 × 10¹⁰

Factors of 81689427200

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 2158

Divisors of 81689427200

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 29 32 40 50 58 64 80 100 116 128 145 160 200 232 233 256 290 320 400 464 466 580 640 725 800 928 932 1160 1165 1280 1450 1600 1856 1864 1889 2320 2330 2900 3200 3712 3728 3778 4640 4660 5800 5825 6400 6757 7424 7456 7556 9280 9320 9445 11600 11650 13514 14912 15112 18560 18640 18890 23200 23300 27028 29824 30224 33785 37120 37280 37780 46400 46600 47225 54056 54781 59648 60448 67570 74560 75560 92800 93200 94450 108112 109562 120896 135140 149120 151120 168925 185600 186400 188900 216224 219124 241792 270280 273905 298240 302240 337850 372800 377800 432448 438248 440137 483584 540560 547810 604480 675700 745600 755600 864896 876496 880274 1081120 1095620 1208960 1351400 1369525 1491200 1511200 1729792 1752992 1760548 2162240 2191240 2200685 2417920 2702800 2739050 3022400 3505984 3521096 4324480 4382480 4401370 5405600 5478100 6044800 7011968 7042192 8648960 8764960 8802740 10811200 10956200 11003425 12089600 12763973 14023936 14084384 17529920 17605480 21622400 21912400 22006850 25527946 28168768 35059840 35210960 43244800 43824800 44013700 51055892 56337536 63819865 70119680 70421920 87649600 88027400 102111784 112675072 127639730 140843840 175299200 176054800 204223568 255279460 281687680 319099325 350598400 352109600 408447136 510558920 563375360 638198650 704219200 816894272 1021117840 1276397300 1408438400 1633788544 2042235680 2552794600 2816876800 3267577088 4084471360 5105589200 8168942720 10211178400 16337885440 20422356800 40844713600 81689427200
• Sum of all divisors σ(n): 210175219800
• Sum of proper divisors (its aliquot sum) s(n): 128485792600
• 81689427200 is an abundant number, because the sum of its proper divisors (128485792600) is greater than itself. Its abundance is 46796365400

Bases of 81689427200

• Binary: 1001100000101000100011011110100000000₂
• Hexadecimal: 0x130511BD00
• Base-36: 11IZRXFK

Squares and roots of 81689427200

• 81689427200 squared (81689427200²) is 6673162516264099840000
• 81689427200 cubed (81689427200³) is 545126823566124999853211648000000
• The square root of 81689427200 is 285813.6231882589
• The cube root of 81689427200 is 4338.9896775405

Scales and comparisons

• 81,689,427,200 seconds is equal to 2,597 years, 24 weeks, 3 days, 11 hours, 33 minutes, 20 seconds.
• To count from 1 to 81,689,427,200 would take you about five thousand, one hundred ninety-four 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 81689427200 cubic inches would be around 361.6 feet tall.

Recreational maths with 81689427200

• 81689427200 backwards is 00272498618
• The number of decimal digits it has is: 11
• The sum of 81689427200's digits is 47
• More coming soon!