81221938363800

Names of 81221938363800

• Cardinal: 81221938363800 can be written as Eighty-one trillion, two hundred twenty-one billion, nine hundred thirty-eight million, three hundred sixty-three thousand, eight hundred.

Scientific notation

• Scientific notation: 8.12219383638 × 10¹³

Factors of 81221938363800

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 2867

Divisors of 81221938363800

• Number of divisors d(n): 720
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 18 20 24 25 26 27 30 36 39 40 45 50 52 54 60 65 72 75 78 81 90 100 104 108 117 120 130 135 150 156 162 180 195 200 216 225 234 260 270 300 312 324 325 351 360 390 397 405 450 468 520 540 585 600 648 650 675 702 780 794 810 900 936 975 1053 1080 1170 1191 1300 1350 1404 1560 1588 1620 1755 1800 1950 1985 2025 2106 2340 2382 2447 2600 2700 2808 2925 3176 3240 3510 3573 3900 3970 4050 4212 4680 4764 4894 5161 5265 5400 5850 5955 7020 7146 7341 7800 7940 8100 8424 8775 9528 9788 9925 10322 10530 10719 11700 11910 12235 14040 14292 14682 15483 15880 16200 17550 17865 19576 19850 20644 21060 21438 22023 23400 23820 24470 25805 26325 28584 29364 29775 30966 31811 32157 35100 35730 36705 39700 41288 42120 42876 44046 46449 47640 48940 51610 52650 53595 58728 59550 61175 61932 63622 64314 66069 70200 71460 73410 77415 79400 85752 88092 89325 92898 95433 97880 103220 105300 107190 110115 119100 122350 123864 127244 128628 129025 132138 139347 142920 146820 154830 157609 159055 160785 176184 178650 183525 185796 190866 198207 206440 210600 214380 220230 232245 238200 244700 254488 257256 258050 264276 267975 278694 286299 293640 309660 315218 318110 321570 330345 357300 367050 371592 381732 387075 396414 418041 428760 440460 464490 472827 477165 489400 516100 528552 535950 550575 557388 572598 619320 630436 636220 643140 660690 696735 714600 734100 763464 774150 788045 792828 795275 803925 836082 858897 880920 928980 945654 954330 971459 991035 1032200 1071900 1101150 1114776 1145196 1161225 1260872 1272440 1286280 1321380 1393470 1418481 1431495 1468200 1548300 1576090 1585656 1590550 1607850 1651725 1672164 1717794 1857960 1891308 1908660 1942918 1982070 2048917 2090205 2143800 2202300 2290392 2322450 2364135 2385825 2576691 2642760 2786940 2836962 2862990 2914377 3096600 3152180 3181100 3215700 3303450 3344328 3435588 3483675 3782616 3817320 3885836 3940225 3964140 4097834 4180410 4255443 4294485 4404600 4644900 4728270 4771650 4857295 4955175 5153382 5573880 5673924 5725980 5828754 6146751 6304360 6362200 6431400 6606900 6871176 6967350 7092405 7157475 7771672 7880450 7928280 8195668 8360820 8510886 8588970 8743131 9289800 9456540 9543300 9714590 9910350 10244585 10306764 10451025 11347848 11451960 11657508 11820675 12293502 12628967 12766329 12883455 13213800 13934700 14184810 14314950 14571885 15760900 16391336 16721640 17021772 17177940 17486262 18440253 18913080 19086600 19429180 19820700 20489170 20613528 20902050 21277215 21472425 23315016 23641350 24286475 24587004 25257934 25532658 25766910 26229393 27869400 28369620 28629900 29143770 30733755 31521800 34043544 34355880 34972524 35462025 36880506 37886901 38858360 39641400 40978340 41804100 42554430 42944850 43715655 47282700 48572950 49174008 50515868 51065316 51222925 51533820 52458786 55320759 56739240 57259800 58287540 61467510 63144835 63831645 64417275 69945048 70924050 72859425 73761012 75773802 78688179 81956680 83608200 85108860 85889700 87431310 92201265 94565400 97145900 101031736 102130632 102445850 103067640 104917572 106386075 110641518 113660703 116575080 122935020 126289670 127663290 128834550 131146965 141848100 145718850 147522024 151547604 153668775 157376358 165962277 170217720 171779400 174862620 184402530 189434505 194291800 204891700 209835144 212772150 218578275 221283036 227321406 245870040 252579340 255326580 257669100 262293930 276603795 283696200 291437700 303095208 307337550 314752716 315724175 319158225 331924554 340982109 349725240 368805060 378869010 385669223 393440895 409783400 425544300 437156550 442566072 454642812 461006325 505158680 510653160 515338200 524587860 553207590 568303515 582875400 614675100 629505432 631448350 638316450 655734825 663849108 681964218 737610120 757738020 771338446 786881790 829811385 851088600 874313100 909285624 922012650 947172525 1022946327 1049175720 1106415180 1136607030 1157007669 1229350200 1262896700 1276632900 1311469650 1327698216 1363928436 1383018975 1515476040 1542676892 1573763580 1659622770 1704910545 1748626200 1844025300 1894345050 1928346115 1967204475 2045892654 2212830360 2273214060 2314015338 2525793400 2553265800 2622939300 2727856872 2766037950 2841517575 3085353784 3147527160 3319245540 3409821090 3471023007 3688050600 3788690100 3856692230 3934408950 4091785308 4149056925 4546428120 4628030676 5013699899 5114731635 5245878600 5532075900 5683035150 5785038345 6638491080 6819642180 6942046014 7577380200 7713384460 7868817900 8183570616 8298113850 8524552725 9256061352 9641730575 10027399798 10229463270 10413069021 11064151800 11366070300 11570076690 13639284360 13884092028 15041099697 15426768920 15737635800 16596227700 17049105450 17355115035 19283461150 20054799596 20458926540 20826138042 22732140600 23140153380 25068499495 25573658175 27768184056 28925191725 30082199394 31239207063 33192455400 34098210900 34710230070 38566922300 40109599192 40917853080 41652276084 45123299091 46280306760 50136998990 51147316350 52065345105 57850383450 60164398788 62478414126 68196421800 69420460140 75205498485 77133844600 83304552168 86775575175 90246598182 100273997980 102294632700 104130690210 115700766900 120328797576 124956828252 125342497475 135369897273 138840920280 150410996970 156196035315 173551150350 180493196364 200547995960 204589265400 208261380420 225616495455 231401533800 249913656504 250684994950 260326725525 270739794546 300821993940 312392070630 347102300700 360986392728 376027492425 406109691819 416522760840 451232990910 501369989900 520653451050 541479589092 601643987880 624784141260 676849486365 694204601400 752054984850 780980176575 812219383638 902465981820 1002739979800 1041306902100 1082959178184 1128082477275 1249568282520 1353698972730 1504109969700 1561960353150 1624438767276 1804931963640 2030548459095 2082613804200 2256164954550 2707397945460 3008219939400 3123920706300 3248877534552 3384247431825 4061096918190 4512329909100 5414795890920 6247841412600 6768494863650 8122193836380 9024659818200 10152742295475 13536989727300 16244387672760 20305484590950 27073979454600 40610969181900 81221938363800
• Sum of all divisors σ(n): 304687122838560
• Sum of proper divisors (its aliquot sum) s(n): 223465184474760
• 81221938363800 is an abundant number, because the sum of its proper divisors (223465184474760) is greater than itself. Its abundance is 142243246110960

Bases of 81221938363800

• Binary: 10010011101111011110100110010001011110110011000₂
• Hexadecimal: 0x49DEF4C8BD98
• Base-36: SSGUD0HI0

Squares and roots of 81221938363800

• 81221938363800 squared (81221938363800²) is 6597003271572926221150440000
• 81221938363800 cubed (81221938363800³) is 535821393109483166211085885607250072000000
• The square root of 81221938363800 is 9012321.4747255881
• The cube root of 81221938363800 is 43306.9684187103

Scales and comparisons

• 81,221,938,363,800 seconds is equal to 2,582,606 years, 21 weeks, 1 hour, 30 minutes.
• To count from 1 to 81,221,938,363,800 would take you about six million, four hundred fifty-six thousand, five hundred sixteen 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 81221938363800 cubic inches would be around 3608.9 feet tall.

Recreational maths with 81221938363800

• 81221938363800 backwards is 00836383912218
• 81221938363800 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81221938363800's digits is 54
• More coming soon!