81637897876990

Names of 81637897876990

• Cardinal: 81637897876990 can be written as Eighty-one trillion, six hundred thirty-seven billion, eight hundred ninety-seven million, eight hundred seventy-six thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 8.163789787699 × 10¹³

Factors of 81637897876990

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 923

Divisors of 81637897876990

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 5 7 10 13 14 19 26 35 38 49 65 70 91 95 98 130 133 182 190 245 247 266 455 490 494 637 665 877 910 931 1235 1274 1330 1729 1754 1862 2470 3185 3458 4385 4655 6139 6370 8645 8770 9310 11401 12103 12278 16663 17290 22802 24206 30695 33326 42973 57005 60515 61390 79807 83315 85946 114010 116641 121030 159614 166630 214865 216619 233282 399035 429730 433238 558649 583205 769129 798070 816487 1083095 1117298 1166410 1516333 1538258 1632974 2166190 2793245 3032666 3845645 4082435 5383903 5586490 7581665 7691290 8164870 9998677 10614331 10767806 14613451 15163330 19997354 21228662 26919515 29226902 37687321 49993385 53071655 53839030 69990739 73067255 75374642 99986770 102294157 106143310 139981478 146134510 188436605 189974863 204588314 349953695 376873210 379949726 489935173 511470785 674526133 699907390 716059099 949874315 979870346 1022941570 1329824041 1349052266 1432118198 1899748630 2449675865 2659648082 3372630665 3580295495 4721682931 4899351730 6649120205 6745261330 7160590990 8768839729 9308768287 9443365862 12815996527 13298240410 17537679458 18617536574 23608414655 25631993054 33051780517 43844198645 46543841435 47216829310 61381878103 64079982635 66103561034 87688397290 89711975689 93087682870 122763756206 128159965270 165258902585 166607954851 179423951378 306909390515 330517805170 333215909702 429673146721 448559878445 613818781030 627983829823 833039774255 859346293442 897119756890 1166255683957 1255967659646 1666079548510 2148365733605 2332511367914 3139919149115 4296731467210 5831278419785 6279838298230 8163789787699 11662556839570 16327579575398 40818948938495 81637897876990
• Sum of all divisors σ(n): 193999075099200
• Sum of proper divisors (its aliquot sum) s(n): 112361177222210
• 81637897876990 is an abundant number, because the sum of its proper divisors (112361177222210) is greater than itself. Its abundance is 30723279345220

Bases of 81637897876990

• Binary: 10010100011111111001101111001110011010111111110₂
• Hexadecimal: 0x4A3FCDE735FE
• Base-36: SXRXKKFZY

Squares and roots of 81637897876990

• 81637897876990 squared (81637897876990²) is 6664746369773848349171460100
• 81637897876990 cubed (81637897876990³) is 544095883511637263651246958723288493099000
• The square root of 81637897876990 is 9035369.2717558589
• The cube root of 81637897876990 is 43380.7714725373

Scales and comparisons

• 81,637,897,876,990 seconds is equal to 2,595,832 years, 32 weeks, 5 days, 6 hours, 43 minutes, 10 seconds.
• To count from 1 to 81,637,897,876,990 would take you about six million, four hundred eighty-nine thousand, five hundred eighty-one 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 81637897876990 cubic inches would be around 3615.1 feet tall.

Recreational maths with 81637897876990

• 81637897876990 backwards is 09967879873618
• The number of decimal digits it has is: 14
• The sum of 81637897876990's digits is 88
• More coming soon!