81978515921283200

Names of 81978515921283200

• Cardinal: 81978515921283200 can be written as Eighty-one quadrillion, nine hundred seventy-eight trillion, five hundred fifteen billion, nine hundred twenty-one million, two hundred eighty-three thousand, two hundred.

Scientific notation

• Scientific notation: 8.19785159212832 × 10¹⁶

Factors of 81978515921283200

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 897

Divisors of 81978515921283200

• Number of divisors d(n): 360
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 32 40 50 64 79 80 100 128 158 160 200 316 320 395 400 632 640 790 800 811 1264 1580 1600 1622 1975 2528 3160 3200 3244 3950 4055 5056 6241 6320 6488 7900 8110 10112 12482 12640 12976 15800 16220 20275 24964 25280 25952 31205 31600 32440 40550 49928 50560 51904 62410 63200 64069 64880 81100 99856 103808 124820 126400 128138 129760 156025 162200 199712 249640 252800 256276 259520 312050 320345 324400 399424 493039 499280 512552 519040 624100 640690 648800 657721 798848 986078 998560 1025104 1248200 1281380 1297600 1315442 1601725 1972156 1997120 2050208 2465195 2496400 2562760 2595200 2630884 3203450 3288605 3944312 3994240 4100416 4930390 4992800 5061451 5125520 5261768 6406900 6577210 7888624 8200832 9860780 9985600 10122902 10251040 10523536 12325975 12813800 13154420 15777248 16443025 19721560 19971200 20245804 20502080 21047072 24651950 25307255 25627600 26308840 31554496 32886050 38950081 39443120 40491608 41004160 42094144 49303900 50614510 51255200 51959959 52617680 63108992 65772100 77900162 78886240 80983216 84188288 98607800 101229020 102510400 103919918 105235360 126536275 131544200 155800324 157772480 161966432 194750405 197215600 202458040 205020800 207839836 210470720 253072550 259799795 263088400 311600648 315544960 323932864 389500810 394431200 399854629 404916080 415679672 420941440 506145100 519599590 526176800 623201296 647865728 779001620 788862400 799709258 809832160 831359344 973752025 1012290200 1039199180 1052353600 1246402592 1298998975 1558003240 1577724800 1599418516 1619664320 1662718688 1947504050 1999273145 2024580400 2078398360 2104707200 2492805184 2597997950 3116006480 3198837032 3239328640 3325437376 3895008100 3998546290 4049160800 4104836761 4156796720 4985610368 5195995900 6232012960 6397674064 6650874752 7790016200 7997092580 8098321600 8209673522 8313593440 9996365725 10391991800 12464025920 12795348128 15580032400 15994185160 16196643200 16419347044 16627186880 19992731450 20524183805 20783983600 24928051840 25590696256 31160064800 31588515691 31988370320 32838694088 33254373760 39985462900 41048367610 41567967200 51181392512 62320129600 63177031382 63976740640 65677388176 79970925800 82096735220 83135934400 102620919025 124640259200 126354062764 127953481280 131354776352 157942578455 159941851600 164193470440 166271868800 205241838050 252708125528 255906962560 262709552704 315885156910 319883703200 324282104119 328386940880 410483676100 505416251056 525419105408 631770313820 639767406400 648564208238 656773881760 789712892275 820967352200 1010832502112 1263540627640 1279534812800 1297128416476 1313547763520 1579425784550 1621410520595 1641934704400 2021665004224 2527081255280 2594256832952 2627095527040 3158851569100 3242821041190 3283869408800 4043330008448 5054162510560 5188513665904 6317703138200 6485642082380 6567738817600 8107052602975 10108325021120 10377027331808 12635406276400 12971284164760 13135477635200 16214105205950 20216650042240 20754054663616 25270812552800 25618286225401 25942568329520 32428210411900 41508109327232 50541625105600 51236572450802 51885136659040 64856420823800 101083250211200 102473144901604 103770273318080 128091431127005 129712841647600 204946289803208 207540546636160 256182862254010 259425683295200 409892579606416 512365724508020 518851366590400 640457155635025 819785159212832 1024731449016040 1037702733180800 1280914311270050 1639570318425664 2049462898032080 2561828622540100 3279140636851328 4098925796064160 5123657245080200 8197851592128320 10247314490160400 16395703184256640 20494628980320800 40989257960641600 81978515921283200
• Sum of all divisors σ(n): 205362087761068965
• Sum of proper divisors (its aliquot sum) s(n): 123383571839785765
• 81978515921283200 is an abundant number, because the sum of its proper divisors (123383571839785765) is greater than itself. Its abundance is 41405055918502565

Bases of 81978515921283200

• Binary: 100100011001111110000011010100000101100111010100010000000₂
• Hexadecimal: 0x1233F06A0B3A880
• Base-36: MF6YIB0Z3I8

Squares and roots of 81978515921283200

• 81978515921283200 squared (81978515921283200²) is 6720477072656083109658734602240000
• 81978515921283200 cubed (81978515921283200³) is 550934736699355422069633966203100795902394368000000
• The square root of 81978515921283200 is 286318905.9794745723
• The cube root of 81978515921283200 is 434410.2033187769

Scales and comparisons

• 81,978,515,921,283,200 seconds is equal to 2,606,663,230 years, 5 weeks, 14 hours, 13 minutes, 20 seconds.
• To count from 1 to 81,978,515,921,283,200 would take you about seven billion, eight hundred nineteen million, nine hundred eighty-nine thousand, six hundred ninety 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 81978515921283200 cubic inches would be around 36200.9 feet tall.

Recreational maths with 81978515921283200

• 81978515921283200 backwards is 00238212951587918
• The number of decimal digits it has is: 17
• The sum of 81978515921283200's digits is 71
• More coming soon!