81998155980

Names of 81998155980

• Cardinal: 81998155980 can be written as Eighty-one billion, nine hundred ninety-eight million, one hundred fifty-five thousand, nine hundred eighty.

Scientific notation

• Scientific notation: 8.199815598 × 10¹⁰

Factors of 81998155980

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 131

Divisors of 81998155980

• Number of divisors d(n): 1152
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 13 15 17 18 19 20 26 27 29 30 34 36 38 39 43 45 51 52 54 57 58 60 65 68 76 78 85 86 87 90 95 102 108 114 116 117 129 130 135 145 153 156 170 171 172 174 180 190 195 204 215 221 228 234 247 255 258 260 261 270 285 290 306 323 340 342 348 351 377 380 387 390 430 435 442 459 468 493 494 510 513 516 522 540 551 559 570 580 585 612 645 646 663 684 702 731 741 754 765 774 780 783 817 841 855 860 870 884 918 969 986 988 1020 1026 1044 1102 1105 1118 1131 1140 1161 1170 1235 1247 1290 1292 1305 1326 1404 1462 1479 1482 1508 1530 1548 1566 1615 1634 1653 1677 1682 1710 1740 1755 1836 1885 1935 1938 1972 1989 2052 2193 2204 2210 2223 2236 2262 2295 2322 2340 2451 2465 2470 2494 2523 2565 2580 2610 2652 2755 2795 2907 2924 2958 2964 3060 3132 3230 3268 3306 3315 3354 3364 3393 3420 3510 3655 3705 3741 3770 3870 3876 3915 3978 4085 4199 4205 4386 4420 4437 4446 4524 4590 4644 4845 4902 4930 4940 4959 4988 5031 5046 5130 5220 5510 5590 5655 5805 5814 5916 5967 6235 6409 6460 6579 6612 6630 6669 6708 6786 7020 7163 7310 7353 7395 7410 7482 7540 7569 7740 7830 7956 8170 8265 8385 8398 8410 8721 8772 8874 8892 9180 9367 9503 9690 9804 9860 9918 9945 10062 10092 10179 10260 10621 10933 10965 11020 11115 11180 11223 11310 11610 11628 11934 12255 12470 12597 12615 12818 13158 13260 13311 13338 13572 13889 14297 14326 14535 14620 14706 14790 14820 14877 14964 15093 15138 15660 15979 16211 16340 16530 16770 16796 16820 16965 17442 17748 18705 18734 19006 19227 19380 19737 19836 19890 20124 20358 20995 21199 21242 21489 21866 21930 22059 22185 22230 22446 22620 22707 23220 23693 23868 24510 24795 24940 25155 25194 25230 25636 26316 26622 26676 27778 28101 28509 28594 28652 29070 29412 29580 29754 29835 30186 30276 31863 31958 32045 32422 32799 32895 33060 33345 33540 33669 33930 34884 35815 36163 36765 37410 37468 37791 37845 38012 38454 39474 39780 40716 41667 41990 42398 42484 42891 42978 43605 43732 43860 44118 44370 44460 44892 45414 46835 47386 47515 47937 48633 49020 49590 50310 50388 50460 50895 53105 53244 54665 55556 56115 56202 57018 57188 57681 58140 59508 59670 60372 62985 63597 63726 63916 64090 64467 64844 65598 65790 66555 66690 67338 67860 69445 71079 71485 71630 72326 73530 74385 74820 75465 75582 75690 76908 78948 79895 81055 83334 83980 84303 84796 85527 85782 85956 87210 88236 88740 90828 93670 94772 95030 95589 95874 96135 97266 98397 98685 99180 100620 101790 105995 106210 107445 108489 109330 110295 112230 112404 113373 113535 114036 115362 118465 119340 121771 125001 125970 127194 127452 128180 128673 128934 131196 131580 133110 133380 134676 138890 140505 142158 142545 142970 143260 143811 144652 145899 147060 148770 150930 151164 151380 159315 159790 162110 163995 166668 168345 168606 171054 171564 173043 174420 180557 180815 185861 187340 188955 190060 190791 191178 191748 192270 193401 194532 196794 197370 203580 207727 208335 211990 212420 213237 214455 214890 216978 218660 220590 224460 226746 227070 230724 236930 239685 243165 243542 250002 251940 252909 254388 256581 257346 257868 266220 271643 275587 277780 281010 284316 285090 285940 286767 287622 288405 291798 295191 297540 301860 308009 317985 318630 319580 322335 324220 325467 327990 336690 337212 342108 346086 355395 361114 361630 365313 371722 375003 377910 381582 382356 384540 386019 386802 393588 394740 402781 415454 416670 421515 423980 426474 427635 428910 429780 431433 433956 437697 441180 453492 454140 470119 473860 477945 479370 486330 487084 491985 500004 505818 513162 514692 541671 542445 543286 551174 557583 562020 566865 570180 572373 573534 575244 576810 583596 590382 608855 614771 616018 623181 625005 635970 637260 639711 643365 644670 650934 655980 673380 687097 692172 710790 719055 722228 723260 729495 730626 743444 750006 755820 763164 772038 773604 805562 814929 826761 830908 833340 843030 852948 855270 857820 862866 865215 875394 902785 924027 929305 940238 953955 955890 958740 967005 972660 976401 983970 1011636 1026324 1038635 1066185 1083342 1084890 1086572 1095939 1102348 1115166 1133730 1144746 1147068 1153620 1180764 1208343 1217710 1229542 1232036 1246362 1250010 1264545 1271940 1279422 1282905 1286730 1289340 1301868 1358215 1374194 1377935 1410357 1421580 1433835 1438110 1458990 1461252 1475955 1500012 1540045 1544076 1611124 1625013 1627335 1629858 1653522 1672749 1686060 1710540 1725732 1730430 1750788 1805570 1826565 1844313 1848054 1858610 1869543 1875015 1880476 1907910 1911780 1930095 1934010 1952802 1967940 2013905 2061291 2077270 2132370 2157165 2166684 2169780 2188485 2191878 2230332 2267460 2289492 2350595 2416686 2435420 2444787 2459084 2480283 2492724 2500020 2529090 2558844 2565810 2573460 2708355 2716430 2748388 2755870 2772081 2787915 2820714 2861865 2867670 2876220 2917980 2951910 3073855 3080090 3115905 3198555 3250026 3254670 3259716 3287817 3307044 3345498 3435485 3460860 3531359 3611140 3625029 3653130 3688626 3696108 3717220 3739086 3750030 3815820 3860190 3868020 3905604 4027810 4074645 4122582 4133805 4154540 4231071 4264740 4314330 4376970 4383756 4620135 4701190 4833372 4875039 4882005 4889574 4960566 5018247 5058180 5131620 5236153 5416710 5432860 5479695 5511740 5532939 5544162 5575830 5608629 5641428 5723730 5735340 5903820 6041715 6147710 6160180 6183873 6231810 6397110 6500052 6509340 6575634 6690996 6870970 7051785 7062718 7250058 7306260 7334361 7377252 7440849 7478172 7500060 7720380 7992023 8055620 8125065 8149290 8245164 8267610 8316243 8363745 8462142 8628660 8753940 8932261 9221565 9240270 9347715 9402380 9750078 9764010 9779148 9921132 10036494 10306455 10472306 10594077 10833420 10875087 10959390 11065878 11088324 11151660 11217258 11447460 11680649 12083430 12223935 12295420 12367746 12401415 12463620 12693213 12794220 13151268 13741940 13860405 14103570 14125436 14500116 14668722 14881698 15708459 15984046 16250130 16298580 16439085 16535220 16598817 16632486 16727490 16924284 17656795 17864522 18125145 18443130 18480540 18551619 18695430 19500156 19528020 20072988 20612910 20944612 21155355 21188154 21750174 21918780 22131756 22434516 23361298 23976069 24166860 24375195 24447870 24735492 24802830 25091235 25386426 26180765 26796783 27664695 27720810 28043145 28207140 29337444 29763396 30919365 31416918 31782231 31968092 32500260 32878170 33197634 33264972 33454980 35041947 35313590 35729044 36250290 36671805 36886260 37103238 37204245 37390860 39960115 41225820 41581215 42310710 42376308 43500348 44661305 46722596 47125377 47952138 48750390 48895740 49605660 50182470 50772852 52361530 52970385 53593566 54375435 55329390 55441620 56086290 58403245 61838730 62833836 63466065 63564462 65756340 66395268 70083894 70627180 71928207 72500580 73343610 74206476 74408490 78542295 79920230 80390349 82994085 83162430 84621420 89322610 92758095 94250754 95346693 95904276 97500780 100364940 104723060 105125841 105940770 107187132 108750870 110658780 112172580 116806490 119880345 123677460 126932130 127128924 133983915 140167788 141376131 143856414 146687220 148816980 151848437 157084590 158911155 159840460 160780698 165988170 166324860 175209735 178645220 185516190 188501508 190693386 210251682 211881540 215784621 217501740 233612980 235626885 239760690 241171047 253864260 267967830 282752262 287712828 303696874 314169180 315377523 317822310 321561396 331976340 350419470 359641035 371032380 381386772 401951745 420503364 431569242 455545311 471253770 476733465 479521380 482342094 525629205 535935660 565504524 607393748 630755046 635644620 700838940 706880655 719282070 759242185 803903490 863138484 911090622 942507540 953466930 964684188 1051258410 1078923105 1205855235 1261510092 1366635933 1413761310 1438564140 1518484370 1576887615 1607806980 1822181244 1906933860 2102516820 2157846210 2277726555 2411710470 2733271866 2827522620 3036968740 3153775230 4099907799 4315692420 4555453110 4823420940 5466543732 6307550460 6833179665 8199815598 9110906220 13666359330 16399631196 20499538995 27332718660 40999077990 81998155980
• Sum of all divisors σ(n): 324496972800
• Sum of proper divisors (its aliquot sum) s(n): 242498816820
• 81998155980 is an abundant number, because the sum of its proper divisors (242498816820) is greater than itself. Its abundance is 160500660840

Bases of 81998155980

• Binary: 1001100010111011110001001000011001100₂
• Hexadecimal: 0x13177890CC
• Base-36: 11O3L230

Squares and roots of 81998155980

• 81998155980 squared (81998155980²) is 6723697584120409760400
• 81998155980 cubed (81998155980³) is 551330803265054530634793627192000
• The square root of 81998155980 is 286353.2014488401
• The cube root of 81998155980 is 4344.4489192207

Scales and comparisons

• 81,998,155,980 seconds is equal to 2,607 years, 14 weeks, 6 days, 17 hours, 33 minutes.
• To count from 1 to 81,998,155,980 would take you about five thousand, two hundred fourteen 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 81998155980 cubic inches would be around 362 feet tall.

Recreational maths with 81998155980

• 81998155980 backwards is 08955189918
• The number of decimal digits it has is: 11
• The sum of 81998155980's digits is 63
• More coming soon!