81978742440
81,978,742,440 is an even composite number composed of six prime numbers multiplied together.
81978742440 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of seven hundred sixty-eight divisors.
Prime factorization of 81978742440:
23 × 35 × 5 × 73 × 67 × 367
(2 × 2 × 2 × 3 × 3 × 3 × 3 × 3 × 5 × 7 × 7 × 7 × 67 × 367)See below for interesting mathematical facts about the number 81978742440 from the Numbermatics database.
Names of 81978742440
- Cardinal: 81978742440 can be written as Eighty-one billion, nine hundred seventy-eight million, seven hundred forty-two thousand, four hundred forty.
Scientific notation
- Scientific notation: 8.197874244 × 1010
Factors of 81978742440
Divisors of 81978742440
- Number of divisors d(n): 768
-
Complete list of divisors:
1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 27 28 30 35 36 40 42 45 49 54 56 60 63 67 70 72 81 84 90 98 105 108 120 126 134 135 140 147 162 168 180 189 196 201 210 216 243 245 252 268 270 280 294 315 324 335 343 360 367 378 392 402 405 420 441 469 486 490 504 536 540 567 588 603 630 648 670 686 734 735 756 804 810 840 882 938 945 972 980 1005 1029 1080 1101 1134 1176 1206 1215 1260 1323 1340 1372 1407 1468 1470 1512 1608 1620 1701 1715 1764 1809 1835 1876 1890 1944 1960 2010 2058 2202 2205 2268 2345 2412 2430 2520 2569 2646 2680 2744 2814 2835 2936 2940 3015 3087 3240 3283 3303 3402 3430 3528 3618 3670 3752 3780 3969 4020 4116 4221 4404 4410 4536 4690 4824 4860 5138 5145 5292 5427 5505 5628 5670 5880 6030 6174 6566 6606 6615 6804 6860 7035 7236 7340 7560 7707 7938 8040 8232 8442 8505 8808 8820 9045 9261 9380 9720 9849 9909 10276 10290 10584 10854 11010 11256 11340 11907 12060 12348 12663 12845 13132 13212 13230 13608 13720 14070 14472 14680 15414 15435 15876 16281 16415 16515 16884 17010 17640 17983 18090 18522 18760 19698 19818 19845 20552 20580 21105 21708 22020 22680 22981 23121 23814 24120 24589 24696 25326 25690 26264 26424 26460 27135 27783 28140 29547 29727 30828 30870 31752 32562 32830 33030 33768 34020 35966 36180 37044 37989 38535 39396 39636 39690 41160 42210 43416 44040 45962 46242 46305 47628 49178 49245 49545 50652 51380 52920 53949 54270 55566 56280 59094 59454 59535 61656 61740 63315 65124 65660 66060 68040 68943 69363 71932 72360 73767 74088 75978 77070 78792 79272 79380 81405 83349 84420 88641 89181 89915 91924 92484 92610 95256 98356 98490 99090 101304 102760 107898 108540 111132 113967 114905 115605 118188 118908 119070 122945 123480 125881 126630 130248 131320 132120 137886 138726 138915 143864 147534 147735 148635 151956 154140 158760 161847 162810 166698 168840 172123 177282 178362 179830 183848 184968 185220 189945 196712 196980 198180 206829 208089 215796 217080 221301 222264 227934 229810 231210 236376 237816 238140 245890 251762 253260 265923 269745 275772 277452 277830 295068 295470 297270 303912 308280 323694 325620 333396 344246 344715 346815 354564 356724 359660 368835 370440 377643 379890 393960 396360 413658 416178 416745 431592 442602 443205 445905 455868 459620 462420 476280 485541 491780 503524 506520 516369 531846 539490 551544 554904 555660 569835 590136 590940 594540 620487 624267 629405 647388 651240 663903 666792 688492 689430 693630 709128 713448 719320 737670 755286 759780 797769 809235 827316 832356 833490 860615 885204 886410 891810 911736 919240 924840 971082 983560 1007048 1032738 1034145 1040445 1063692 1078980 1106505 1111320 1132929 1139670 1181880 1189080 1204861 1240974 1248534 1258810 1294776 1327806 1329615 1376984 1378860 1387260 1456623 1475340 1510572 1519560 1549107 1595538 1618470 1654632 1664712 1666980 1721230 1770408 1772820 1783620 1861461 1888215 1942164 1991709 2065476 2068290 2080890 2127384 2157960 2213010 2265858 2279340 2409722 2427705 2481948 2497068 2517620 2581845 2655612 2659230 2757720 2774520 2913246 2950680 3021144 3098214 3102435 3121335 3191076 3236940 3319515 3333960 3398787 3442460 3545640 3567240 3614583 3722922 3776430 3884328 3983418 3988845 4130952 4136580 4161780 4369869 4426020 4531716 4558680 4647321 4819444 4855410 4963896 4994136 5035240 5163690 5311224 5318460 5584383 5664645 5826492 5975127 6024305 6196428 6204870 6242670 6382152 6473880 6639030 6797574 6884920 7229166 7283115 7445844 7552860 7745535 7966836 7977690 8273160 8323560 8434027 8739738 8852040 9063432 9294642 9307305 9638888 9710820 9958545 10196361 10327380 10636920 10843749 11168766 11329290 11652984 11950254 12048610 12392856 12409740 12485340 13278060 13595148 13941963 14458332 14566230 14891688 15105720 15491070 15933672 15955380 16868054 16993935 17479476 18072915 18589284 18614610 19421640 19917090 20392722 20654760 21687498 21849345 22337532 22658580 23236605 23900508 24097220 24819480 24970680 25302081 26556120 27190296 27883926 27921915 28916664 29132460 29875635 30589083 30982140 31910760 32531247 33736108 33987870 34958952 36145830 37178568 37229220 39834180 40785444 41825889 42170135 43374996 43698690 44675064 45317160 46473210 47801016 48194440 50604162 50981805 54218745 55767852 55843830 58264920 59751270 61178166 61964280 65062494 67472216 67975740 69709815 72291660 74458440 75906243 79668360 81570888 83651778 84340270 86749992 87397380 92946420 97593741 101208324 101963610 108437490 111535704 111687660 119502540 122356332 126510405 130124988 135951480 139419630 144583320 151812486 152945415 162656235 167303556 168680540 174794760 185892840 195187482 202416648 203927220 209129445 216874980 223375320 227718729 239005080 244712664 253020810 260249976 278839260 292781223 303624972 305890830 325312470 334607112 337361080 379531215 390374964 407854440 418258890 433749960 455437458 487968705 506041620 557678520 585562446 607249944 611781660 650624940 683156187 759062430 780749928 836517780 910874916 975937410 1012083240 1138593645 1171124892 1223563320 1301249880 1366312374 1463906115 1518124860 1673035560 1821749832 1951874820 2049468561 2277187290 2342249784 2732624748 2927812230 3036249720 3415780935 3903749640 4098937122 4554374580 5465249496 5855624460 6831561870 8197874244 9108749160 10247342805 11711248920 13663123740 16395748488 20494685610 27326247480 40989371220 81978742440
- Sum of all divisors σ(n): 327914496000
- Sum of proper divisors (its aliquot sum) s(n): 245935753560
- 81978742440 is an abundant number, because the sum of its proper divisors (245935753560) is greater than itself. Its abundance is 163957011120
Bases of 81978742440
- Binary: 10011000101100101000001010110101010002
- Hexadecimal: 0x13165056A8
- Base-36: 11NS0YI0
Squares and roots of 81978742440
- 81978742440 squared (819787424402) is 6720514212043857153600
- 81978742440 cubed (819787424403) is 550939303653502911579125918784000
-
The
square root of 81978742440 is 286319.3015498605 -
The
cube root of 81978742440 is 4344.1060343153
Scales and comparisons
How big is 81978742440?- 81,978,742,440 seconds is equal to 2,606 years, 34 weeks, 6 days, 54 minutes.
-
To count from 1 to 81,978,742,440 would take you about five thousand, two hundred thirteen 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 81978742440 cubic inches would be around 362 feet tall.
Recreational maths with 81978742440
- 81978742440 backwards is 04424787918
- 81978742440 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81978742440's digits is 54
- More coming soon!
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The information we have on file for 81978742440 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
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