81443821680

Names of 81443821680

• Cardinal: 81443821680 can be written as Eighty-one billion, four hundred forty-three million, eight hundred twenty-one thousand, six hundred eighty.

Scientific notation

• Scientific notation: 8.144382168 × 10¹⁰

Factors of 81443821680

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 200

Divisors of 81443821680

• Number of divisors d(n): 1120
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 16 17 18 20 24 26 27 30 34 36 39 40 45 48 51 52 54 60 65 68 71 72 78 80 81 85 89 90 102 104 108 117 120 130 135 136 142 144 153 156 162 170 178 180 195 204 208 213 216 221 234 240 243 255 260 267 270 272 284 306 312 324 340 351 355 356 360 390 405 408 426 432 442 445 459 468 486 510 520 534 540 568 585 612 624 639 648 663 680 702 710 712 720 729 765 780 801 810 816 852 884 890 918 923 936 972 1020 1040 1053 1065 1068 1080 1105 1136 1157 1170 1207 1215 1224 1278 1296 1326 1335 1360 1377 1404 1420 1424 1458 1513 1530 1560 1602 1620 1704 1755 1768 1780 1836 1846 1872 1917 1944 1989 2040 2106 2130 2136 2160 2210 2295 2314 2340 2403 2414 2430 2448 2556 2652 2670 2754 2769 2808 2840 2916 3026 3060 3120 3159 3195 3204 3240 3315 3408 3471 3510 3536 3560 3621 3645 3672 3692 3834 3888 3978 4005 4080 4131 4212 4260 4272 4420 4539 4590 4615 4628 4680 4806 4828 4860 5112 5265 5304 5340 5508 5538 5616 5680 5751 5785 5832 5967 6035 6052 6120 6318 6319 6390 6408 6480 6630 6885 6942 7020 7120 7209 7242 7290 7344 7384 7565 7668 7956 8010 8262 8307 8424 8520 8840 9078 9180 9230 9256 9360 9477 9585 9612 9656 9720 9945 10224 10413 10530 10608 10680 10863 11016 11076 11502 11570 11664 11934 12015 12070 12104 12240 12393 12636 12638 12780 12816 13260 13617 13770 13845 13884 14040 14418 14484 14580 14768 15130 15336 15691 15795 15912 16020 16524 16614 16848 17040 17253 17355 17680 17901 18105 18156 18360 18460 18512 18954 18957 19170 19224 19312 19440 19669 19890 20655 20826 21060 21360 21627 21726 22032 22152 22695 23004 23140 23868 24030 24140 24208 24786 24921 25272 25276 25560 26520 27234 27540 27690 27768 28080 28755 28836 28968 29160 29835 30260 30672 31239 31382 31590 31595 31824 32040 32589 33048 33228 34506 34710 35802 36045 36210 36312 36720 36920 37908 37914 38340 38448 39338 39780 40851 41310 41535 41652 42120 43254 43452 44304 45390 46008 46280 47073 47385 47736 48060 48280 49572 49842 50544 50552 51120 51759 52065 53040 53703 54315 54468 55080 55380 55536 56871 57510 57672 57936 58320 59007 59670 60520 61965 62478 62764 63180 63190 64080 64881 65178 66096 66456 68085 69012 69420 71604 72090 72420 72624 73840 74763 75816 75828 76680 78455 78676 79560 81702 82147 82620 83070 83304 84240 86265 86508 86904 89505 90780 92016 92560 93717 94146 94770 94785 95472 96120 96560 97767 98345 99144 99684 101104 103518 104130 107406 107423 108135 108630 108936 110160 110760 113742 115020 115344 118014 119340 121040 122553 123930 124605 124956 125528 126360 126380 129762 130356 132912 136170 138024 138840 141219 143208 144180 144840 149526 151632 151656 153360 156195 156910 157352 159120 161109 162945 163404 164294 165240 166140 166608 170613 172530 173016 173808 177021 179010 181560 187434 188292 189540 189570 192240 195534 196690 198288 199368 204255 207036 208260 214812 214846 216270 217260 217872 221520 224289 227484 230040 235365 236028 238680 245106 246441 247860 249210 249912 251056 252720 252760 258795 259524 260712 268515 272340 276048 277680 281151 282438 284355 286416 288360 289680 293301 295035 299052 303312 312390 313820 314704 322218 322269 324405 325890 326808 328588 330480 332280 341226 345060 346032 354042 358020 363120 367659 373815 374868 376584 379080 379140 391068 393380 398736 408510 410735 414072 416520 423657 429624 429692 432540 434520 448578 454968 460080 468585 470730 472056 477360 488835 490212 492882 495720 498420 499824 505520 511839 517590 519048 521424 531063 537030 537115 544680 562302 564876 568710 576720 586602 590070 598104 612765 624780 627640 644436 644538 648810 651780 653616 657176 664560 672867 682452 690120 706095 708084 716040 735318 739323 747630 749736 753168 758160 758280 782136 786760 805545 817020 821470 828144 833040 843453 847314 853065 859248 859384 865080 869040 879903 885105 897156 909936 937170 941460 944112 966807 977670 980424 985764 991440 996840 1023678 1035180 1038096 1062126 1074060 1074230 1089360 1102977 1121445 1124604 1129752 1137420 1173204 1180140 1196208 1225530 1232205 1249560 1255280 1270971 1288872 1289076 1297620 1303560 1314352 1345734 1364904 1380240 1396499 1405755 1412190 1416168 1432080 1466505 1470636 1478646 1495260 1499472 1516560 1535517 1564272 1573520 1593189 1611090 1611345 1634040 1642940 1686906 1694628 1706130 1718768 1730160 1759806 1770210 1794312 1838295 1874340 1882920 1933614 1955340 1960848 1971528 1993680 2047356 2070360 2118285 2124252 2148120 2148460 2205954 2217969 2242890 2249208 2259504 2274840 2346408 2360280 2451060 2464410 2499120 2541942 2559195 2577744 2578152 2595240 2607120 2655315 2691468 2729808 2792998 2811510 2824380 2832336 2900421 2933010 2941272 2957292 2990520 3071034 3186378 3222180 3222690 3268080 3285880 3364335 3373812 3389256 3412260 3519612 3540420 3588624 3676590 3696615 3748680 3765840 3812913 3867228 3910680 3943056 4094712 4140720 4189497 4217265 4236570 4248504 4296240 4296920 4399515 4411908 4435938 4485780 4498416 4549680 4606551 4692816 4720560 4779567 4834035 4902120 4928820 5083884 5118390 5156304 5190480 5310630 5382936 5514885 5585996 5623020 5648760 5800842 5866020 5882544 5914584 5981040 6142068 6354855 6372756 6444360 6445380 6571760 6653907 6728670 6747624 6778512 6824520 6982495 7039224 7080840 7353180 7393230 7497360 7625826 7677585 7734456 7821360 7965945 8189424 8378994 8434530 8473140 8497008 8593840 8701263 8799030 8823816 8871876 8971560 9213102 9559134 9668070 9804240 9857640 10167768 10236780 10621260 10765872 11029770 11089845 11171992 11246040 11297520 11438739 11601684 11732040 11829168 12284136 12568491 12709710 12745512 12888720 12890760 13307814 13457340 13495248 13649040 13964990 14078448 14161680 14338701 14502105 14706360 14786460 15251652 15355170 15468912 15931890 16757988 16869060 16946280 17402526 17598060 17647632 17743752 17943120 18426204 19064565 19118268 19336140 19715280 19961721 20335536 20473560 20947485 21242520 22059540 22179690 22343984 22492080 22877478 23032755 23203368 23464080 23897835 24568272 25136982 25419420 25491024 25781520 26103789 26615628 26914680 27929980 28677402 29004210 29412720 29572920 30503304 30710340 31863780 33269535 33515976 33738120 33892560 34805052 35196120 35487504 36852408 37705473 38129130 38236536 38672280 39923442 40947120 41894970 42485040 43506315 44119080 44359380 45754956 46065510 46406736 47795670 50273964 50838840 52207578 53231256 53829360 55859960 57193695 57354804 58008420 59145840 59885163 61006608 61420680 62842455 63727560 66539070 67031952 67476240 69610104 70392240 71693505 73704816 75410946 76258260 76473072 77344560 78311367 79846884 83789940 87012630 88238160 88718760 91509912 92131020 95591340 99808605 100547928 101677680 104415156 106462512 111719920 113116419 114387390 114709608 116016840 119770326 122841360 125684910 127455120 130518945 133078140 139220208 143387010 150821892 152516520 156622734 159693768 167579880 174025260 177437520 183019824 184262040 188527365 191182680 199617210 201095856 208830312 226232838 228774780 229419216 232033680 239540652 251369820 261037890 266156280 286774020 299425815 301643784 305033040 313245468 319387536 335159760 339349257 348050520 368524080 377054730 382365360 391556835 399234420 417660624 452465676 457549560 479081304 502739640 522075780 532312560 565582095 573548040 598851630 603287568 626490936 678698514 696101040 754109460 783113670 798468840 904931352 915099120 958162608 1005479280 1018047771 1044151560 1131164190 1147096080 1197703260 1252981872 1357397028 1508218920 1566227340 1596937680 1696746285 1809862704 2036095542 2088303120 2262328380 2395406520 2714794056 3016437840 3132454680 3393492570 4072191084 4524656760 4790813040 5090238855 5429588112 6264909360 6786985140 8144382168 9049313520 10180477710 13573970280 16288764336 20360955420 27147940560 40721910840 81443821680
• Sum of all divisors σ(n): 331977502080
• Sum of proper divisors (its aliquot sum) s(n): 250533680400
• 81443821680 is an abundant number, because the sum of its proper divisors (250533680400) is greater than itself. Its abundance is 169089858720

Bases of 81443821680

• Binary: 1001011110110011011100001100001110000₂
• Hexadecimal: 0x12F66E1870
• Base-36: 11EXJR00

Squares and roots of 81443821680

• 81443821680 squared (81443821680²) is 6633096089843638022400
• 81443821680 cubed (81443821680³) is 540224695127530514178813445632000
• The square root of 81443821680 is 285383.6394750057
• The cube root of 81443821680 is 4334.6368106065

Scales and comparisons

• 81,443,821,680 seconds is equal to 2,589 years, 34 weeks, 2 days, 19 hours, 48 minutes.
• To count from 1 to 81,443,821,680 would take you about five thousand, one hundred seventy-nine 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 81443821680 cubic inches would be around 361.2 feet tall.

Recreational maths with 81443821680

• 81443821680 backwards is 08612834418
• 81443821680 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81443821680's digits is 45
• More coming soon!