121785128640

Names of 121785128640

• Cardinal: 121785128640 can be written as One hundred twenty-one billion, seven hundred eighty-five million, one hundred twenty-eight thousand, six hundred forty.

Scientific notation

• Scientific notation: 1.2178512864 × 10¹¹

Factors of 121785128640

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 5221

Divisors of 121785128640

• Number of divisors d(n): 448
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 27 28 30 32 35 36 40 42 45 48 54 56 60 63 64 70 72 80 84 90 96 105 108 112 120 126 135 140 144 160 168 180 189 192 210 216 224 240 252 270 280 288 315 320 336 360 378 420 421 432 448 480 504 540 560 576 630 672 720 756 840 842 864 945 960 1008 1080 1120 1260 1263 1344 1440 1512 1680 1684 1728 1890 2016 2105 2160 2240 2520 2526 2880 2947 3024 3360 3368 3780 3789 4032 4210 4320 4783 5040 5052 5894 6048 6315 6720 6736 7560 7578 8420 8640 8841 9566 10080 10104 11367 11788 12096 12630 13472 14349 14735 15120 15156 16840 17682 18945 19132 20160 20208 22734 23576 23915 25260 26523 26944 28698 29470 30240 30312 33481 33680 35364 37890 38264 40416 43047 44205 45468 47152 47830 50520 53046 56835 57396 58940 60480 60624 66962 67360 70728 71745 75780 76528 79569 80832 86094 88410 90936 94304 95660 100443 101040 106092 113670 114792 117880 121248 129141 132615 133924 134720 141456 143490 151560 153056 159138 167405 172188 176820 181872 188608 191320 200886 202080 212184 215235 227340 229584 235760 242496 258282 265230 267848 282912 286980 301329 303120 306112 318276 334810 344376 353640 363744 382640 397845 401772 404160 424368 430470 454680 459168 471520 502215 516564 530460 535696 565824 573960 602658 606240 636552 645705 669620 688752 707280 727488 765280 795690 803544 848736 860940 903987 909360 918336 943040 1004430 1033128 1060920 1071392 1147920 1205316 1212480 1273104 1291410 1339240 1377504 1414560 1506645 1530560 1591380 1607088 1697472 1721880 1807974 1818720 2008860 2013643 2066256 2121840 2142784 2295840 2410632 2546208 2582820 2678480 2755008 2829120 3013290 3182760 3214176 3443760 3615948 3637440 4017720 4027286 4132512 4243680 4519935 4591680 4821264 5092416 5165640 5356960 6026580 6040929 6365520 6428352 6887520 7231896 8035440 8054572 8265024 8487360 9039870 9642528 10068215 10331280 10713920 12053160 12081858 12731040 13775040 14095501 14463792 16070880 16109144 18079740 18122787 19285056 20136430 20662560 24106320 24163716 25462080 28191002 28927584 30204645 32141760 32218288 36159480 36245574 40272860 41325120 42286503 48212640 48327432 54368361 56382004 57855168 60409290 64436576 70477505 72318960 72491148 80545720 84573006 90613935 96425280 96654864 108736722 112764008 120818580 126859509 128873152 140955010 144637920 144982296 161091440 169146012 181227870 193309728 211432515 217473444 225528016 241637160 253719018 271841805 281910020 289275840 289964592 322182880 338292024 362455740 380578527 386619456 422865030 434946888 451056032 483274320 507438036 543683610 563820040 579929184 634297545 644365760 676584048 724911480 761157054 845730060 869893776 902112064 966548640 1014876072 1087367220 1127640080 1159858368 1268595090 1353168096 1449822960 1522314108 1691460120 1739787552 1902892635 1933097280 2029752144 2174734440 2255280160 2537190180 2706336192 2899645920 3044628216 3382920240 3479575104 3805785270 4059504288 4349468880 4510560320 5074380360 5799291840 6089256432 6765840480 7611570540 8119008576 8698937760 10148760720 12178512864 13531680960 15223141080 17397875520 20297521440 24357025728 30446282160 40595042880 60892564320 121785128640
• Sum of all divisors σ(n): 492275896320
• Sum of proper divisors (its aliquot sum) s(n): 370490767680
• 121785128640 is an abundant number, because the sum of its proper divisors (370490767680) is greater than itself. Its abundance is 248705639040

Bases of 121785128640

• Binary: 1110001011010111101011001011011000000₂
• Hexadecimal: 0x1C5AF596C0
• Base-36: 1JY3PYO0

Squares and roots of 121785128640

• 121785128640 squared (121785128640²) is 14831617557861348249600
• 121785128640 cubed (121785128640³) is 1806270452223426939861374828544000
• The square root of 121785128640 is 348977.2609211093
• The cube root of 121785128640 is 4956.7622252773

Scales and comparisons

• 121,785,128,640 seconds is equal to 3,872 years, 20 weeks, 2 days, 2 hours, 24 minutes.
• To count from 1 to 121,785,128,640 would take you about seven thousand, seven hundred forty-four 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 121785128640 cubic inches would be around 413.1 feet tall.

Recreational maths with 121785128640

• 121785128640 backwards is 046821587121
• 121785128640 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 121785128640's digits is 45
• More coming soon!