81420360840
81,420,360,840 is an even composite number composed of six prime numbers multiplied together.
81420360840 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of three hundred twenty divisors.
Prime factorization of 81420360840:
23 × 34 × 5 × 7 × 13 × 276151
(2 × 2 × 2 × 3 × 3 × 3 × 3 × 5 × 7 × 13 × 276151)See below for interesting mathematical facts about the number 81420360840 from the Numbermatics database.
Names of 81420360840
- Cardinal: 81420360840 can be written as Eighty-one billion, four hundred twenty million, three hundred sixty thousand, eight hundred forty.
Scientific notation
- Scientific notation: 8.142036084 × 1010
Factors of 81420360840
Divisors of 81420360840
- Number of divisors d(n): 320
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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 52 54 56 60 63 65 70 72 78 81 84 90 91 104 105 108 117 120 126 130 135 140 156 162 168 180 182 189 195 210 216 234 252 260 270 273 280 312 315 324 351 360 364 378 390 405 420 455 468 504 520 540 546 567 585 630 648 702 728 756 780 810 819 840 910 936 945 1053 1080 1092 1134 1170 1260 1365 1404 1512 1560 1620 1638 1755 1820 1890 2106 2184 2268 2340 2457 2520 2730 2808 2835 3240 3276 3510 3640 3780 4095 4212 4536 4680 4914 5265 5460 5670 6552 7020 7371 7560 8190 8424 9828 10530 10920 11340 12285 14040 14742 16380 19656 21060 22680 24570 29484 32760 36855 42120 49140 58968 73710 98280 147420 276151 294840 552302 828453 1104604 1380755 1656906 1933057 2209208 2485359 2761510 3313812 3589963 3866114 4142265 4970718 5523020 5799171 6627624 7179926 7456077 7732228 8284530 9665285 9941436 10769889 11046040 11598342 12426795 14359852 14912154 15464456 16569060 17397513 17949815 19330570 19882872 21539778 22368231 23196684 24853590 25129741 28719704 28995855 29824308 32309667 33138120 34795026 35899630 37280385 38661140 43079556 44736462 46393368 49707180 50259482 52192539 53849445 57991710 59648616 64619334 69590052 71799260 74560770 75389223 77322280 86159112 86987565 89472924 96929001 99414360 100518964 104385078 107698890 111841155 115983420 125648705 129238668 139180104 143598520 149121540 150778446 156577617 161548335 173975130 178945848 193858002 201037928 208770156 215397780 223682310 226167669 231966840 251297410 258477336 260962695 290787003 298243080 301556892 313155234 323096670 347950260 376946115 387716004 417540312 430795560 447364620 452335338 484645005 502594820 521925390 581574006 603113784 626310468 646193340 678503007 695900520 753892230 775432008 782888085 894729240 904670676 969290010 1005189640 1043850780 1130838345 1163148012 1252620936 1292386680 1357006014 1453935015 1507784460 1565776170 1809341352 1938580020 2035509021 2087701560 2261676690 2326296024 2714012028 2907870030 3015568920 3131552340 3392515035 3877160040 4071018042 4523353380 5428024056 5815740060 6263104680 6785030070 8142036084 9046706760 10177545105 11631480120 13570060140 16284072168 20355090210 27140120280 40710180420 81420360840
- Sum of all divisors σ(n): 336817071360
- Sum of proper divisors (its aliquot sum) s(n): 255396710520
- 81420360840 is an abundant number, because the sum of its proper divisors (255396710520) is greater than itself. Its abundance is 173976349680
Bases of 81420360840
- Binary: 10010111101010000100000011100100010002
- Hexadecimal: 0x12F5081C88
- Base-36: 11EJKWI0
Squares and roots of 81420360840
- 81420360840 squared (814203608402) is 6629275159315805505600
- 81420360840 cubed (814203608403) is 539757975579141371781210640704000
-
The
square root of 81420360840 is 285342.5324763205 -
The
cube root of 81420360840 is 4334.2205564539
Scales and comparisons
How big is 81420360840?- 81,420,360,840 seconds is equal to 2,588 years, 47 weeks, 4 days, 6 hours, 54 minutes.
-
To count from 1 to 81,420,360,840 would take you about five thousand, one hundred seventy-seven 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 81420360840 cubic inches would be around 361.2 feet tall.
Recreational maths with 81420360840
- 81420360840 backwards is 04806302418
- 81420360840 is a
Harshad number . - The number of decimal digits it has is: 11
- The sum of 81420360840's digits is 36
- More coming soon!
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