81971121960

Names of 81971121960

• Cardinal: 81971121960 can be written as Eighty-one billion, nine hundred seventy-one million, one hundred twenty-one thousand, nine hundred sixty.

Scientific notation

• Scientific notation: 8.197112196 × 10¹⁰

Factors of 81971121960

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 1501

Divisors of 81971121960

• Number of divisors d(n): 768
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 13 14 15 18 20 21 24 26 27 28 30 35 36 39 40 42 45 49 52 54 56 60 63 65 70 72 78 81 84 90 91 98 104 105 108 117 120 126 130 135 140 147 156 162 168 180 182 189 195 196 210 216 234 243 245 252 260 270 273 280 294 312 315 324 351 360 364 378 390 392 405 420 441 455 468 486 490 504 520 540 546 567 585 588 630 637 648 702 728 729 735 756 780 810 819 840 882 910 936 945 972 980 1053 1080 1092 1134 1170 1176 1215 1260 1274 1323 1365 1404 1458 1470 1471 1512 1560 1620 1638 1701 1755 1764 1820 1890 1911 1944 1960 2106 2184 2187 2205 2268 2340 2430 2457 2520 2548 2646 2730 2808 2835 2916 2940 2942 3159 3185 3240 3276 3402 3510 3528 3640 3645 3780 3822 3969 4095 4212 4374 4410 4413 4536 4680 4860 4914 5096 5103 5265 5292 5460 5670 5733 5832 5880 5884 6318 6370 6552 6615 6804 7020 7290 7355 7371 7560 7644 7938 8190 8424 8505 8748 8820 8826 9477 9555 9720 9828 10206 10297 10530 10584 10920 10935 11340 11466 11768 11907 12285 12636 12740 13230 13239 13608 14040 14580 14710 14742 15288 15309 15795 15876 16380 17010 17199 17496 17640 17652 18954 19110 19123 19656 19845 20412 20594 21060 21870 22065 22113 22680 22932 23814 24570 25272 25480 25515 26460 26478 28431 28665 29160 29420 29484 30618 30891 31590 31752 32760 34020 34398 35304 35721 36855 37908 38220 38246 39690 39717 40824 41188 42120 43740 44130 44226 45864 47385 47628 49140 51030 51485 51597 52920 52956 56862 57330 57369 58840 58968 59535 61236 61782 63180 66195 66339 68040 68796 71442 72079 73710 75816 76440 76492 76545 79380 79434 82376 85995 87480 88260 88452 92673 94770 95256 95615 98280 102060 102970 103194 105912 107163 110565 113724 114660 114738 119070 119151 122472 123564 126360 132390 132678 133861 137592 142155 142884 144158 147420 152984 153090 154455 154791 158760 158868 171990 172107 176520 176904 178605 185346 189540 191230 198585 199017 204120 205940 206388 214326 216237 221130 227448 229320 229476 238140 238302 247128 257985 264780 265356 267722 278019 284310 285768 286845 288316 294840 306180 308910 309582 317736 331695 343980 344214 357210 357453 360395 370692 379080 382460 397170 398034 401583 411880 412776 428652 432474 442260 458952 463365 464373 476280 476604 515970 516321 529560 530712 535444 535815 556038 568620 573690 576632 595755 612360 617820 619164 648711 663390 669305 687960 688428 714420 714906 720790 741384 764920 773955 794340 796068 803166 834057 857304 860535 864948 884520 926730 928746 937027 953208 995085 1031940 1032642 1070888 1071630 1072359 1081185 1112076 1137240 1147380 1191510 1204749 1235640 1238328 1297422 1326780 1338610 1376856 1390095 1393119 1428840 1429812 1441580 1547910 1548963 1588680 1592136 1606332 1668114 1721070 1729896 1787265 1853460 1857492 1874054 1946133 1990170 2007915 2063880 2065284 2143260 2144718 2162370 2224152 2294760 2321865 2383020 2409498 2502171 2581605 2594844 2653560 2677220 2780190 2786238 2811081 2859624 2883160 3095820 3097926 3212664 3217077 3243555 3336228 3442140 3574530 3614247 3706920 3714984 3748108 3892266 3980340 4015830 4130568 4170285 4286520 4289436 4324740 4643730 4646889 4685135 4766040 4818996 5004342 5163210 5189688 5354440 5361795 5560380 5572476 5622162 5838399 6023745 6191640 6195852 6434154 6487110 6672456 6884280 6965595 7149060 7228494 7496216 7506513 7744815 7784532 7960680 8031660 8340570 8433243 8578872 8649480 9287460 9293778 9370270 9637992 9730665 10008684 10326420 10723590 10842741 11120760 11144952 11244324 11676798 12047490 12391704 12510855 12868308 12974220 13931190 13940667 14055405 14298120 14456988 15013026 15489630 15569064 16063320 16085385 16681140 16866486 17515197 18071235 18574920 18587556 18740540 19461330 20017368 20652840 21447180 21685482 22488648 22519539 23234445 23353596 24094980 25021710 25299729 25736616 25948440 27862380 27881334 28110810 28913976 29191995 30026052 30979260 32170770 32528223 33362280 33732972 35030394 36142470 37175112 37481080 37532565 38922660 41822001 42166215 42894360 43370964 45039078 46468890 46707192 48189960 50043420 50599458 52545591 54213705 55724760 55762668 56221620 58383990 60052104 61958520 64341540 65056446 67465944 69703335 70060788 72284940 75065130 75899187 77845320 83644002 84332430 86741928 87575985 90078156 92937780 97584669 100086840 101198916 105091182 108427410 111525336 112443240 112597695 116767980 126498645 128683080 130112892 139406670 140121576 144569880 150130260 151798374 157636773 162641115 167288004 168664860 175151970 180156312 185875560 195169338 202397832 209110005 210182364 216854820 225195390 227697561 233535960 252997290 260225784 262727955 278813340 292754007 300260520 303596748 315273546 325282230 334576008 337329720 350303940 379495935 390338676 418220010 420364728 433709640 450390780 455395122 487923345 505994580 525455910 557626680 585508014 607193496 630547092 650564460 683092683 700607880 758991870 780677352 788183865 836440020 900781560 910790244 975846690 1011989160 1050911820 1138487805 1171016028 1261094184 1301128920 1366185366 1463770035 1517983740 1576367730 1672880040 1821580488 1951693380 2049278049 2101823640 2276975610 2342032056 2732370732 2927540070 3035967480 3152735460 3415463415 3903386760 4098556098 4553951220 5464741464 5855080140 6305470920 6830926830 8197112196 9107902440 10246390245 11710160280 13661853660 16394224392 20492780490 27323707320 40985560980 81971121960
• Sum of all divisors σ(n): 346758451200
• Sum of proper divisors (its aliquot sum) s(n): 264787329240
• 81971121960 is an abundant number, because the sum of its proper divisors (264787329240) is greater than itself. Its abundance is 182816207280

Bases of 81971121960

• Binary: 1001100010101110111000000111100101000₂
• Hexadecimal: 0x1315DC0F28
• Base-36: 11NNHMI0

Squares and roots of 81971121960

• 81971121960 squared (81971121960²) is 6719264835381194241600
• 81971121960 cubed (81971121960³) is 550785677302571196268643305536000
• The square root of 81971121960 is 286305.9935802951
• The cube root of 81971121960 is 4343.9714254401

Scales and comparisons

• 81,971,121,960 seconds is equal to 2,606 years, 22 weeks, 1 day, 20 hours, 6 minutes.
• To count from 1 to 81,971,121,960 would take you about five thousand, two hundred twelve 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 81971121960 cubic inches would be around 362 feet tall.

Recreational maths with 81971121960

• 81971121960 backwards is 06912117918
• 81971121960 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81971121960's digits is 45
• More coming soon!