81027433890

Names of 81027433890

• Cardinal: 81027433890 can be written as Eighty-one billion, twenty-seven million, four hundred thirty-three thousand, eight hundred ninety.

Scientific notation

• Scientific notation: 8.102743389 × 10¹⁰

Factors of 81027433890

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 1004

Divisors of 81027433890

• Number of divisors d(n): 384
• Complete list of divisors:
  1 2 3 5 6 9 10 13 15 18 26 27 30 31 39 45 54 62 65 78 81 90 93 97 117 130 135 155 162 186 194 195 234 243 270 279 291 310 351 390 403 405 465 485 486 558 582 585 702 806 810 837 853 873 930 970 1053 1170 1209 1215 1261 1395 1455 1674 1706 1746 1755 2015 2106 2418 2430 2511 2522 2559 2619 2790 2910 3007 3159 3510 3627 3783 4030 4185 4265 4365 5022 5118 5238 5265 6014 6045 6305 6318 7254 7533 7566 7677 7857 8370 8530 8730 9021 10530 10881 11089 11349 12090 12555 12610 12795 13095 15035 15066 15354 15714 15795 18042 18135 18915 21762 22178 22698 23031 23571 25110 25590 26190 26443 27063 30070 31590 32643 33267 34047 36270 37665 37830 38385 39091 39285 45105 46062 47142 52886 54126 54405 55445 56745 65286 66534 68094 69093 75330 76770 78182 78570 79329 81189 82741 90210 97929 99801 102141 108810 110890 113490 115155 117273 117855 132215 135315 138186 158658 162378 163215 165482 166335 170235 195455 195858 199602 204282 207279 230310 234546 235710 237987 243567 248223 264430 270630 299403 306423 326430 332670 340470 343759 345465 351819 390910 396645 405945 413705 414558 475974 487134 489645 496446 499005 510705 586365 598806 612846 687518 690930 703638 713961 730701 744669 793290 811890 827410 898209 979290 998010 1021410 1031277 1036395 1055457 1075633 1172730 1189935 1217835 1241115 1427922 1461402 1489338 1497015 1532115 1718795 1759095 1796418 2062554 2072790 2110914 2141883 2151266 2234007 2379870 2435670 2482230 2564971 2694627 2994030 3064230 3093831 3166371 3226899 3437590 3518190 3569805 3653505 3723345 4283766 4468014 4491045 5129942 5156385 5277285 5378165 5389254 6187662 6332742 6425649 6453798 6702021 7139610 7307010 7446690 7694913 8982090 9281493 9499113 9680697 10312770 10554570 10709415 10756330 11170035 12824855 12851298 13404042 13473135 15389826 15469155 15831855 16134495 18562986 18998226 19361394 20106063 21418830 22340070 23084739 25649710 26946270 27844479 29042091 30938310 31663710 32128245 32268990 33344623 33510105 38474565 40212126 46169478 46407465 47495565 48403485 55688958 58084182 64256490 66689246 67020210 69254217 76949130 83533437 87126273 92814930 94991130 96806970 100033869 100530315 115423695 138508434 139222395 145210455 166723115 167066874 174252546 200067738 201060630 207762651 230847390 261378819 278444790 290420910 300101607 333446230 346271085 415525302 417667185 435631365 500169345 522757638 600203214 623287953 692542170 835334370 871262730 900304821 1000338690 1038813255 1246575906 1306894095 1500508035 1800609642 2077626510 2613788190 2700914463 3001016070 3116439765 4501524105 5401828926 6232879530 8102743389 9003048210 13504572315 16205486778 27009144630 40513716945 81027433890
• Sum of all divisors σ(n): 245660792832
• Sum of proper divisors (its aliquot sum) s(n): 164633358942
• 81027433890 is an abundant number, because the sum of its proper divisors (164633358942) is greater than itself. Its abundance is 83605925052

Bases of 81027433890

• Binary: 1001011011101100111001000010110100010₂
• Hexadecimal: 0x12DD9C85A2
• Base-36: 1181N44I

Squares and roots of 81027433890

• 81027433890 squared (81027433890²) is 6565445042798320532100
• 81027433890 cubed (81027433890³) is 531981164163769137517762372869000
• The square root of 81027433890 is 284653.1817668653
• The cube root of 81027433890 is 4327.2371312923

Scales and comparisons

• 81,027,433,890 seconds is equal to 2,576 years, 21 weeks, 6 days, 12 hours, 31 minutes, 30 seconds.
• To count from 1 to 81,027,433,890 would take you about five thousand, one hundred fifty-two 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 81027433890 cubic inches would be around 360.6 feet tall.

Recreational maths with 81027433890

• 81027433890 backwards is 09833472018
• 81027433890 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81027433890's digits is 45
• More coming soon!