81620268840

Names of 81620268840

• Cardinal: 81620268840 can be written as Eighty-one billion, six hundred twenty million, two hundred sixty-eight thousand, eight hundred forty.

Scientific notation

• Scientific notation: 8.162026884 × 10¹⁰

Factors of 81620268840

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 3321

Divisors of 81620268840

• Number of divisors d(n): 448
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 15 18 20 22 24 27 30 33 36 40 44 45 54 55 60 66 72 79 81 88 90 99 108 110 120 132 135 158 162 165 180 198 216 220 237 243 264 270 297 316 324 330 360 395 396 405 440 474 486 495 540 594 632 648 660 711 729 790 792 810 869 891 948 972 990 1080 1185 1188 1215 1320 1422 1458 1485 1580 1620 1738 1782 1896 1944 1980 2133 2370 2376 2430 2607 2673 2844 2916 2970 3160 3221 3240 3476 3555 3564 3645 3960 4266 4345 4455 4740 4860 5214 5346 5688 5832 5940 6399 6442 6952 7110 7128 7290 7821 8019 8532 8690 8910 9480 9663 9720 10428 10665 10692 11880 12798 12884 13035 13365 14220 14580 15642 16038 16105 17064 17380 17820 19197 19326 20856 21330 21384 23463 25596 25768 26070 26730 28440 28989 29160 31284 31995 32076 32210 34760 35431 35640 38394 38652 39105 40095 42660 46926 48315 51192 52140 53460 57591 57978 62568 63990 64152 64420 70389 70862 76788 77304 78210 80190 85320 86967 93852 95985 96630 104280 106293 106920 115182 115956 117315 127980 128840 140778 141724 144945 153576 156420 160380 173934 177155 187704 191970 193260 211167 212586 230364 231912 234630 254459 255960 260901 281556 283448 287955 289890 312840 318879 320760 347868 351945 354310 383940 386520 422334 425172 434835 460728 469260 508918 521802 531465 563112 575910 579780 633501 637758 695736 703890 708620 763377 767880 782703 844668 850344 869670 938520 956637 1017836 1043604 1055835 1062930 1151820 1159560 1267002 1272295 1275516 1304505 1407780 1417240 1526754 1565406 1594395 1689336 1739340 1913274 2035672 2087208 2111670 2125860 2290131 2303640 2348109 2534004 2544590 2551032 2609010 2799049 2815560 2869911 3053508 3130812 3167505 3188790 3478680 3816885 3826548 3913515 4223340 4251720 4580262 4696218 4783185 5068008 5089180 5218020 5598098 5739822 6107016 6261624 6335010 6377580 6870393 7633770 7653096 7827030 8397147 8446680 8609733 9160524 9392436 9566370 10178360 10436040 11196196 11450655 11479644 11740545 12670020 12755160 13740786 13995245 14349555 15267540 15654060 16794294 17219466 18321048 18784872 19132740 20611179 22392392 22901310 22959288 23481090 25191441 25340040 25829199 27481572 27990490 28699110 30535080 31308120 33588588 34351965 34438932 38265480 41222358 41985735 43048665 45802620 46962180 50382882 51658398 54963144 55980980 57398220 61833537 67177176 68703930 68877864 75574323 82444716 83971470 86097330 91605240 93924360 100765764 103055895 103316796 111961960 114796440 123667074 125957205 129145995 137407860 151148646 164889432 167942940 172194660 185500611 201531528 206111790 206633592 226722969 247334148 251914410 258291990 274815720 302297292 309167685 335885880 344389320 371001222 377871615 412223580 453445938 494668296 503828820 516583980 604594584 618335370 680168907 742002444 755743230 824447160 906891876 927503055 1007657640 1033167960 1133614845 1236670740 1360337814 1484004888 1511486460 1813783752 1855006110 2040506721 2267229690 2473341480 2720675628 3022972920 3400844535 3710012220 4081013442 4534459380 5441351256 6801689070 7420024440 8162026884 9068918760 10202533605 13603378140 16324053768 20405067210 27206756280 40810134420 81620268840
• Sum of all divisors σ(n): 304270214400
• Sum of proper divisors (its aliquot sum) s(n): 222649945560
• 81620268840 is an abundant number, because the sum of its proper divisors (222649945560) is greater than itself. Its abundance is 141029676720

Bases of 81620268840

• Binary: 1001100000000111100100111011100101000₂
• Hexadecimal: 0x1300F27728
• Base-36: 11HULMI0

Squares and roots of 81620268840

• 81620268840 squared (81620268840²) is 6661868285513874945600
• 81620268840 cubed (81620268840³) is 543743480440312350610012375104000
• The square root of 81620268840 is 285692.6125051189
• The cube root of 81620268840 is 4337.7648673365

Scales and comparisons

• 81,620,268,840 seconds is equal to 2,595 years, 14 weeks, 1 day, 54 minutes.
• To count from 1 to 81,620,268,840 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 81620268840 cubic inches would be around 361.5 feet tall.

Recreational maths with 81620268840

• 81620268840 backwards is 04886202618
• 81620268840 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81620268840's digits is 45
• More coming soon!