81919421613120

Names of 81919421613120

• Cardinal: 81919421613120 can be written as Eighty-one trillion, nine hundred nineteen billion, four hundred twenty-one million, six hundred thirteen thousand, one hundred twenty.

Scientific notation

• Scientific notation: 8.191942161312 × 10¹³

Factors of 81919421613120

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 70963

Divisors of 81919421613120

• Number of divisors d(n): 1344
• Complete list of divisors:
  1 2 3 4 5 6 7 8 10 12 13 14 15 16 20 21 24 26 28 30 31 32 35 39 40 42 48 49 52 56 60 61 62 64 65 70 78 80 84 91 93 96 98 104 105 112 120 122 124 130 140 147 155 156 160 168 182 183 186 192 195 196 208 210 217 224 240 244 245 248 260 273 280 294 305 310 312 320 336 364 366 372 390 392 403 416 420 427 434 448 455 465 480 488 490 496 520 546 560 588 610 620 624 637 651 672 728 732 735 744 780 784 793 806 832 840 854 868 910 915 930 960 976 980 992 1040 1085 1092 1120 1176 1209 1220 1240 1248 1274 1281 1302 1344 1365 1456 1464 1470 1488 1519 1560 1568 1586 1612 1680 1708 1736 1820 1830 1860 1891 1911 1952 1960 1984 2015 2080 2135 2170 2184 2240 2352 2379 2418 2440 2480 2496 2548 2562 2604 2730 2821 2912 2928 2940 2976 2989 3038 3120 3136 3172 3185 3224 3255 3360 3416 3472 3640 3660 3720 3782 3822 3904 3920 3965 4030 4160 4270 4340 4368 4557 4704 4758 4836 4880 4960 5096 5124 5208 5460 5551 5642 5673 5824 5856 5880 5952 5978 6045 6076 6240 6344 6370 6405 6448 6510 6720 6832 6944 7280 7320 7440 7564 7595 7644 7840 7930 8060 8463 8540 8680 8736 8967 9114 9408 9455 9516 9555 9672 9760 9920 10192 10248 10416 10920 11102 11284 11346 11712 11760 11895 11956 12090 12152 12480 12688 12740 12810 12896 13020 13237 13664 13888 14105 14560 14640 14880 14945 15128 15190 15288 15680 15860 16120 16653 16926 17080 17360 17472 17934 18228 18910 19032 19110 19344 19520 19747 20384 20496 20832 21840 22204 22568 22692 22785 23520 23790 23912 24180 24304 24583 25376 25480 25620 25792 26040 26474 27328 27755 28210 28365 29120 29280 29760 29890 30256 30380 30576 31720 32240 33306 33852 34160 34720 35868 36456 37820 38064 38220 38688 38857 39494 39711 40768 40992 41664 42315 43680 44408 44835 45136 45384 45570 47040 47580 47824 48360 48608 49166 50752 50960 51240 52080 52948 55510 56420 56730 58560 59241 59780 60512 60760 61152 63440 64480 66185 66612 67704 68320 69440 70841 71736 72912 73749 75640 76128 76440 77376 77714 78988 79422 81984 83265 84630 87360 88816 89670 90272 90768 91140 92659 95160 95648 96720 97216 98332 98735 101920 102480 104160 105896 111020 112840 113460 116571 118482 119560 121024 121520 122304 122915 126880 128960 132370 133224 135408 136640 141682 143472 145824 147498 151280 152256 152880 155428 157976 158844 166530 169260 172081 177632 179340 180544 181536 182280 185318 190320 191296 193440 194285 196664 197470 198555 203840 204960 208320 211792 212523 222040 225680 226920 233142 236964 239120 243040 245830 253760 264740 266448 270816 277977 283364 286944 291648 294996 296205 302560 305760 310856 315952 317688 333060 338520 344162 354205 355264 358680 363072 364560 368745 370636 380640 386880 388570 393328 394940 397110 409920 423584 425046 444080 451360 453840 463295 466284 473928 478240 486080 491660 495887 516243 529480 532896 541632 555954 566728 573888 582855 589992 592410 605120 611520 621712 631904 635376 666120 677040 688324 708410 717360 729120 737490 741272 761280 777140 786656 789880 794220 847168 850092 860405 888160 902720 907680 920933 926590 932568 947856 956480 983320 991774 1032486 1058960 1062615 1065792 1111908 1133456 1165710 1179984 1184820 1204567 1243424 1263808 1270752 1332240 1354080 1376648 1389885 1416820 1434720 1458240 1474980 1482544 1487661 1554280 1573312 1579760 1588440 1700184 1720810 1776320 1815360 1841866 1853180 1865136 1895712 1966640 1983548 2064972 2117920 2125230 2196071 2223816 2266912 2331420 2359968 2369640 2409134 2479435 2486848 2541504 2581215 2664480 2708160 2753296 2762799 2779770 2833640 2869440 2949960 2965088 2975322 3108560 3159520 3176880 3400368 3441620 3471209 3613701 3683732 3706360 3730272 3791424 3933280 3967096 4129944 4235840 4250460 4321301 4392142 4447632 4533824 4604665 4662840 4719936 4739280 4818268 4958870 5162430 5328960 5506592 5525598 5559540 5667280 5899920 5930176 5950644 6022835 6217120 6319040 6353760 6446531 6588213 6800736 6883240 6942418 7227402 7367464 7412720 7438305 7460544 7866560 7934192 8259888 8500920 8642602 8784284 8895264 9209330 9325680 9478560 9636536 9917740 10324860 10413627 10980355 11013184 11051196 11119080 11334560 11799840 11901288 12045670 12434240 12707520 12893062 12963903 13176426 13601472 13766480 13813995 13884836 14454804 14734928 14825440 14876610 15372497 15868384 16519776 17001840 17285204 17356045 17568568 17790528 18068505 18418660 18651360 18957120 19273072 19339593 19835480 20649720 20827254 21606505 21960710 22102392 22238160 22669120 23599680 23802576 24091340 25786124 25927806 26352852 27532960 27627990 27769672 28548923 28909608 29469856 29650880 29753220 30249107 30744994 31736768 32232655 32941065 33039552 34003680 34570408 34712090 35137136 36137010 36837320 37302720 38546144 38679186 39670960 41299440 41654508 43213010 43921420 44204784 44476320 45125717 46117491 47605152 48182680 51572248 51855612 52068135 52705704 55065920 55255980 55539344 56176913 57097846 57819216 58939712 59506440 60498214 61489988 64465310 64819515 65882130 68007360 69140816 69424180 70274272 72274020 73674640 76862485 77092288 77358372 79341920 82598880 83309016 85646769 86426020 87842840 88409568 88952640 90251434 90747321 92234982 95210304 96365360 96697965 103144496 103711224 104136270 105411408 107607479 110511960 111078688 112353826 114195692 115638432 119012880 120996428 122979976 128930620 129639030 131764260 133960331 135377151 138281632 138848360 140548544 142744615 144548040 147349280 151245535 153724970 154716744 158683840 165197760 166618032 168530739 171293538 172852040 175685680 176819136 180502868 181494642 184469964 192730720 193395930 199842461 206288992 207422448 208272540 210822816 211743749 215214958 221023920 222157376 224707652 225628585 228391384 230587455 231276864 238025760 241992856 245959952 257861240 259278060 263528520 267920662 270754302 276563264 277696720 280884565 285489230 289096080 294698560 302491070 307449940 309433488 322822437 333236064 337061478 342587076 345704080 351371360 361005736 362989284 368939928 385461440 386791860 393238391 399684922 401880993 412577984 414844896 416545080 421645632 423487498 428233845 430429916 442047840 449415304 451257170 453736605 456782768 461174910 476051520 483985712 491919904 515722480 518556120 527057040 535841324 538037395 541508604 555393440 561769130 570978460 578192160 599527383 604982140 614899880 618866976 635231247 645644874 666472128 669801655 674122956 676885755 685174152 691408160 702742720 722011472 725978568 737879856 773583720 786476782 799369844 803761986 829689792 833090160 842653695 846974996 856467690 860859832 884095680 898830608 902514340 907473210 913565536 922349820 937722317 967971424 983839808 999212305 1031444960 1037112240 1054114080 1058718745 1071682648 1076074790 1083017208 1110786880 1123538260 1141956920 1156384320 1179715173 1199054766 1209964280 1229799760 1237733952 1270462494 1291289748 1339603310 1348245912 1353771510 1370348304 1382816320 1398897227 1444022944 1451957136 1475759712 1547167440 1572953564 1598739688 1607523972 1614112185 1666180320 1685307390 1693949992 1712935380 1721719664 1741484303 1797661216 1805028680 1814946420 1827131072 1844699640 1875444634 1935942848 1966191955 1998424610 2009404965 2062889920 2074224480 2108228160 2117437490 2143365296 2152149580 2166034416 2247076520 2283913840 2359430346 2398109532 2419928560 2459599520 2540924988 2582579496 2679206620 2696491824 2707543020 2740696608 2752668737 2797794454 2813166951 2888045888 2903914272 2951519424 2997636915 3094334880 3145907128 3176156235 3197479376 3215047944 3228224370 3332360640 3370614780 3387899984 3425870760 3443439328 3482968606 3595322432 3610057360 3629892840 3689399280 3750889268 3932383910 3996849220 4018809930 4148448960 4196691681 4234874980 4286730592 4304299160 4332068832 4494153040 4567827680 4688611585 4718860692 4796219064 4839857120 4919199040 5081849976 5165158992 5224452909 5358413240 5392983648 5415086040 5481393216 5505337474 5595588908 5626333902 5807828544 5898575865 5995273830 6188669760 6291814256 6352312470 6394958752 6430095888 6456448740 6564056219 6741229560 6775799968 6851741520 6886878656 6965937212 6994486135 7220114720 7259785680 7378798560 7501778536 7864767820 7993698440 8037619860 8258006211 8393383362 8469749960 8573461184 8608598320 8664137664 8707421515 8988306080 9135655360 9377223170 9437721384 9592438128 9679714240 10163699952 10330317984 10448905818 10716826480 10785967296 10830172080 11010674948 11191177816 11252667804 11797151730 11990547660 12190390121 12583628512 12704624940 12789917504 12860191776 12912897480 13128112438 13482459120 13551599936 13703483040 13763343685 13931874424 13988972270 14065834755 14440229440 14519571360 14757597120 15003557072 15729535640 15987396880 16075239720 16516012422 16786766724 16939499920 17217196640 17414843030 17976612160 18754446340 18875442768 19184876256 19692168657 20327399904 20660635968 20897811636 20983458405 21433652960 21660344160 22021349896 22382355632 22505335608 23594303460 23981095320 24380780242 25167257024 25409249880 25720383552 25825794960 26122264545 26256224876 26964918240 27406966080 27526687370 27863748848 27977944540 28131669510 29039142720 30007114144 31459071280 31974793760 32150479440 32820281095 33032024844 33573533448 33878999840 34434393280 34829686060 36571170363 37508892680 37750885536 38369752512 39384337314 40654799808 41290031055 41795623272 41966916810 42867305920 43320688320 44042699792 44764711264 45010671216 47188606920 47962190640 48761560484 50818499760 51651589920 52244529090 52512449752 53929836480 55053374740 55727497696 55955889080 56263339020 60014228288 60951950605 62918142560 63949587520 64300958880 65640562190 66064049688 67147066896 67757999680 69659372120 73142340726 75017785360 75501771072 78768674628 82580062110 83591246544 83933833620 85332730847 88085399584 89529422528 90021342432 94377213840 95924381280 97523120968 98460843285 101636999520 103303179840 104489058180 105024899504 110106749480 111454995392 111911778160 112526678040 121903901210 125836285120 128601917760 131281124380 132128099376 134294133792 139318744240 146284681452 150035570720 157537349256 165160124220 167182493088 167867667240 170665461694 176170799168 180042684864 182855851815 188754427680 191848762560 195046241936 196921686570 203273999040 208978116360 210049799008 220213498960 223823556320 225053356080 243807802420 255998192541 262562248760 264256198752 268588267584 278637488480 292569362904 300071141440 315074698512 330320248440 334364986176 335735334480 341330923388 365711703630 377508855360 390092483872 393843373140 417956232720 420099598016 426663654235 440426997920 447647112640 450106712160 487615604840 511996385082 525124497520 528512397504 557274976960 585138725808 630149397024 660640496880 671470668960 682661846776 731423407260 780184967744 787686746280 835912465440 853327308470 880853995840 900213424320 975231209680 1023992770164 1050248995040 1170277451616 1260298794048 1279990962705 1321280993760 1342941337920 1365323693552 1462846814520 1575373492560 1671824930880 1706654616940 1950462419360 2047985540328 2100497990080 2340554903232 2559981925410 2642561987520 2730647387104 2925693629040 3150746985120 3413309233880 3900924838720 4095971080656 5119963850820 5461294774208 5851387258080 6301493970240 6826618467760 8191942161312 10239927701640 11702774516160 13653236935520 16383884322624 20479855403280 27306473871040 40959710806560 81919421613120
• Sum of all divisors σ(n): 341861611456512
• Sum of proper divisors (its aliquot sum) s(n): 259942189843392
• 81919421613120 is an abundant number, because the sum of its proper divisors (259942189843392) is greater than itself. Its abundance is 178022768230272

Bases of 81919421613120

• Binary: 10010101000000101011010000001101000010001000000₂
• Hexadecimal: 0x4A815A068440
• Base-36: T1D9GJ51C

Squares and roots of 81919421613120

• 81919421613120 squared (81919421613120²) is 6710791637428112182956134400
• 81919421613120 cubed (81919421613120³) is 549744169504273447890736740060247523328000
• The square root of 81919421613120 is 9050934.8474685199
• The cube root of 81919421613120 is 43430.5796528081

Scales and comparisons

• 81,919,421,613,120 seconds is equal to 2,604,784 years, 11 weeks, 20 hours, 32 minutes.
• To count from 1 to 81,919,421,613,120 would take you about six million, five hundred eleven thousand, nine hundred sixty 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 81919421613120 cubic inches would be around 3619.2 feet tall.

Recreational maths with 81919421613120

• 81919421613120 backwards is 02131612491918
• 81919421613120 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81919421613120's digits is 48
• More coming soon!