81022122720

Names of 81022122720

• Cardinal: 81022122720 can be written as Eighty-one billion, twenty-two million, one hundred twenty-two thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 8.102212272 × 10¹⁰

Factors of 81022122720

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 16
• Sum of prime factors: 89

Divisors of 81022122720

• Number of divisors d(n): 1200
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 11 12 14 15 16 18 20 21 22 24 27 28 30 32 33 35 36 40 42 44 45 48 54 55 56 60 61 63 66 70 72 77 80 81 84 88 90 96 99 105 108 110 112 120 121 122 126 132 135 140 144 154 160 162 165 168 176 180 183 189 198 210 216 220 224 231 240 242 244 252 264 270 280 288 297 305 308 315 324 330 336 352 360 363 366 378 385 396 405 420 427 432 440 462 480 484 488 495 504 528 540 549 560 567 594 605 610 616 630 648 660 671 672 693 720 726 732 756 770 792 810 840 847 854 864 880 891 915 924 945 968 976 990 1008 1056 1080 1089 1098 1120 1134 1155 1188 1210 1220 1232 1260 1281 1296 1320 1331 1342 1386 1440 1452 1464 1485 1512 1540 1584 1620 1647 1680 1694 1708 1760 1782 1815 1830 1848 1890 1936 1952 1980 2013 2016 2079 2135 2160 2178 2196 2268 2310 2376 2420 2440 2464 2520 2541 2562 2592 2640 2662 2684 2745 2772 2835 2904 2928 2970 3024 3080 3168 3240 3267 3294 3355 3360 3388 3416 3465 3564 3630 3660 3696 3780 3843 3872 3960 3993 4026 4158 4235 4270 4320 4356 4392 4455 4536 4620 4697 4752 4840 4880 4941 5040 5082 5124 5280 5324 5368 5445 5490 5544 5670 5808 5856 5940 6039 6048 6160 6237 6405 6480 6534 6588 6655 6710 6776 6832 6930 7128 7260 7320 7381 7392 7560 7623 7686 7920 7986 8052 8235 8316 8470 8540 8712 8784 8910 9072 9240 9317 9394 9504 9680 9760 9801 9882 10065 10080 10164 10248 10395 10648 10736 10890 10980 11088 11340 11529 11616 11880 11979 12078 12320 12474 12705 12810 12960 13068 13176 13310 13420 13552 13664 13860 14091 14256 14520 14640 14641 14762 15120 15246 15372 15840 15972 16104 16335 16470 16632 16940 17080 17424 17568 17820 18117 18144 18480 18634 18788 19215 19360 19602 19764 19965 20130 20328 20496 20790 21296 21472 21780 21960 22143 22176 22680 22869 23058 23485 23760 23958 24156 24705 24948 25410 25620 26136 26352 26620 26840 27104 27720 27951 28182 28512 29040 29280 29282 29524 30195 30240 30492 30744 31185 31944 32208 32670 32940 33264 33880 34160 34587 34848 35640 35937 36234 36905 36960 37268 37576 38115 38430 39204 39528 39930 40260 40656 40992 41580 42273 42592 43560 43920 43923 44286 45360 45738 46116 46585 46970 47520 47916 48312 49005 49410 49896 50820 51240 51667 52272 52704 53240 53680 54351 55440 55902 56364 57645 58080 58564 59048 59895 60390 60984 61488 62370 63888 64416 65340 65880 66429 66528 67760 68320 68607 69174 70455 71280 71874 72468 73205 73810 74536 75152 76230 76860 78408 79056 79860 80520 81191 81312 83160 83853 84546 87120 87840 87846 88572 90585 90720 91476 92232 93170 93940 95832 96624 98010 98820 99792 101640 102480 102487 103334 104544 106480 107360 107811 108702 110715 110880 111804 112728 114345 115290 117128 118096 119790 120780 121968 122976 124740 126819 127776 130680 131760 131769 132858 135520 137214 138348 139755 140910 142560 143748 144936 146410 147620 149072 150304 152460 153720 155001 156816 158112 159720 161040 162382 166320 167706 169092 172935 174240 175692 177144 179685 181170 182952 184464 186340 187880 191664 193248 196020 197640 199287 199584 203280 204960 204974 206668 211365 212960 215622 217404 219615 221430 223608 225456 228690 230580 234256 236192 239580 241560 243573 243936 249480 251559 253638 258335 261360 263520 263538 265716 271755 274428 276696 279510 281820 287496 289872 292820 295240 298144 304920 307440 307461 310002 313632 319440 322080 324764 332145 332640 335412 338184 343035 345870 351384 354288 359370 362340 365904 368928 372680 375760 380457 383328 392040 395280 395307 398574 405955 406560 409948 413336 419265 422730 431244 434808 439230 442860 447216 450912 457380 461160 465003 468512 479160 483120 487146 498960 503118 507276 512435 516670 522720 527076 531432 539055 543510 548856 553392 559020 563640 568337 574992 579744 585640 590480 597861 609840 614880 614922 620004 634095 638880 649528 658845 664290 670824 676368 686070 691740 702768 708576 718740 724680 730719 731808 745360 751520 754677 760914 775005 784080 790560 790614 797148 811910 819896 826672 838530 845460 862488 869616 878460 885720 893101 894432 914760 922320 922383 930006 958320 966240 974292 996435 997920 1006236 1014552 1024870 1033340 1054152 1062864 1078110 1087020 1097712 1106784 1118040 1127280 1136674 1149984 1171280 1180960 1185921 1195722 1217865 1219680 1229844 1240008 1257795 1268190 1299056 1317690 1328580 1341648 1352736 1372140 1383480 1395009 1405536 1437480 1449360 1461438 1490720 1509354 1521828 1537305 1550010 1568160 1581228 1594296 1623820 1639792 1653344 1677060 1690920 1705011 1724976 1739232 1756920 1771440 1786202 1829520 1844640 1844766 1860012 1902285 1916640 1948584 1976535 1992870 2012472 2029104 2049740 2066680 2108304 2125728 2156220 2174040 2192157 2195424 2236080 2254560 2273348 2325015 2342560 2371842 2391444 2435730 2459688 2480016 2515590 2536380 2598112 2635380 2657160 2679303 2683296 2744280 2766960 2767149 2790018 2841685 2874960 2898720 2922876 2989305 3018708 3043656 3074610 3100020 3162456 3188592 3247640 3279584 3354120 3381840 3410022 3449952 3513840 3542880 3572404 3653595 3659040 3689532 3720024 3773385 3804570 3897168 3953070 3985740 4024944 4058208 4099480 4133360 4185027 4216608 4312440 4348080 4384314 4465505 4472160 4546696 4611915 4650030 4743684 4782888 4871460 4919376 4960032 5031180 5072760 5115033 5270760 5314320 5358606 5488560 5533920 5534298 5580036 5683370 5749920 5845752 5929605 5978610 6037416 6087312 6149220 6200040 6251707 6324912 6377184 6495280 6576471 6708240 6763680 6820044 6975045 7027680 7144808 7307190 7379064 7440048 7546770 7609140 7794336 7906140 7971480 8037909 8049888 8198960 8266720 8301447 8370054 8525055 8624880 8696160 8768628 8931010 9093392 9223830 9300060 9487368 9565776 9742920 9838752 10062360 10145520 10230066 10541520 10628640 10717212 10960785 10977120 11068596 11160072 11366740 11691504 11859210 11957220 12074832 12174624 12298440 12400080 12503414 12649824 12990560 13152942 13396515 13416480 13640088 13835745 13950090 14289616 14614380 14758128 14880096 15093540 15218280 15345099 15812280 15942960 16075818 16397920 16602894 16740108 17050110 17249760 17537256 17862020 18186784 18447660 18600120 18755121 18974736 19131552 19485840 20124720 20291040 20460132 20925135 21083040 21434424 21921570 22137192 22320144 22733480 23383008 23718420 23914440 24113727 24149664 24596880 24800160 25006828 25575165 26305884 26793030 27280176 27671490 27900180 28579232 29228760 29516256 30187080 30436560 30690198 31258535 31624560 31885920 32151636 32882355 33205788 33480216 34100220 35074512 35724040 36895320 37200240 37510242 37949472 38971680 40189545 40249440 40920264 41507235 41850270 42868848 43843140 44274384 44640288 45466960 46035297 47436840 47828880 48227454 49193760 50013656 51150330 52611768 53586060 54560352 55342980 55800360 56265363 58457520 60374160 60873120 61380396 62517070 63249120 64303272 65764710 66411576 66960432 68200440 70149024 71448080 72341181 73790640 74400480 75020484 76725495 80379090 81840528 83014470 83700540 85737696 87686280 88548768 90933920 92070594 93775605 94873680 95657760 96454908 100027312 102300660 105223536 107172120 110685960 111600720 112530726 116915040 120568635 120748320 122760792 125034140 128606544 131529420 132823152 133920864 136400880 142896160 144682362 147581280 150040968 153450990 160758180 163681056 166028940 167401080 168796089 175372560 184141188 187551210 189747360 192909816 200054624 204601320 210447072 214344240 221371920 223201440 225061452 230176485 241137270 245521584 250068280 257213088 263058840 265646304 272801760 281326815 289364724 300081936 306901980 321516360 332057880 334802160 337592178 350745120 361705905 368282376 375102420 385819632 409202640 428688480 442743840 450122904 460352970 482274540 491043168 500136560 506388267 526117680 562653630 578729448 600163872 613803960 643032720 664115760 669604320 675184356 723411810 736564752 750204840 771639264 818405280 843980445 900245808 920705940 964549080 1000273120 1012776534 1052235360 1125307260 1157458896 1227607920 1286065440 1328231520 1350368712 1446823620 1473129504 1500409680 1687960890 1800491616 1841411880 1929098160 2025553068 2250614520 2314917792 2455215840 2531941335 2700737424 2893647240 3000819360 3375921780 3682823760 3858196320 4051106136 4501229040 5063882670 5401474848 5787294480 6751843560 7365647520 8102212272 9002458080 10127765340 11574588960 13503687120 16204424544 20255530680 27007374240 40511061360 81022122720
• Sum of all divisors σ(n): 365358803040
• Sum of proper divisors (its aliquot sum) s(n): 284336680320
• 81022122720 is an abundant number, because the sum of its proper divisors (284336680320) is greater than itself. Its abundance is 203314557600

Bases of 81022122720

• Binary: 1001011011101010010110111101011100000₂
• Hexadecimal: 0x12DD4B7AE0
• Base-36: 117YHA00

Squares and roots of 81022122720

• 81022122720 squared (81022122720²) is 6564584370054740198400
• 81022122720 cubed (81022122720³) is 531876560436369053472481947648000
• The square root of 81022122720 is 284643.8524191239
• The cube root of 81022122720 is 4327.1425822689

Scales and comparisons

• 81,022,122,720 seconds is equal to 2,576 years, 13 weeks, 1 day, 1 hour, 12 minutes.
• To count from 1 to 81,022,122,720 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 81022122720 cubic inches would be around 360.6 feet tall.

Recreational maths with 81022122720

• 81022122720 backwards is 02722122018
• 81022122720 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81022122720's digits is 27
• More coming soon!