81841213440

Names of 81841213440

• Cardinal: 81841213440 can be written as Eighty-one billion, eight hundred forty-one million, two hundred thirteen thousand, four hundred forty.

Scientific notation

• Scientific notation: 8.184121344 × 10¹⁰

Factors of 81841213440

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 18
• Sum of prime factors: 617

Divisors of 81841213440

• Number of divisors d(n): 624
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 16 18 20 21 24 28 30 32 35 36 40 42 45 48 56 60 63 64 70 72 80 84 90 96 105 112 120 126 128 137 140 144 160 168 180 192 210 224 240 252 256 274 280 288 315 320 336 360 384 411 420 448 463 480 504 512 548 560 576 630 640 672 685 720 768 822 840 896 926 959 960 1008 1024 1096 1120 1152 1233 1260 1280 1344 1370 1389 1440 1536 1644 1680 1792 1852 1918 1920 2016 2048 2055 2192 2240 2304 2315 2466 2520 2560 2688 2740 2778 2877 2880 3072 3241 3288 3360 3584 3704 3836 3840 4032 4096 4110 4167 4384 4480 4608 4630 4795 4932 5040 5120 5376 5480 5556 5754 5760 6144 6165 6482 6576 6720 6945 7168 7408 7672 7680 8064 8220 8334 8631 8768 8960 9216 9260 9590 9723 9864 10080 10240 10752 10960 11112 11508 11520 12288 12330 12964 13152 13440 13890 14336 14385 14816 15344 15360 16128 16205 16440 16668 17262 17536 17920 18432 18520 19180 19446 19728 20160 20480 20835 21504 21920 22224 23016 23040 24660 25928 26304 26880 27780 28672 28770 29169 29632 30688 30720 32256 32410 32880 33336 34524 35072 35840 36864 37040 38360 38892 39456 40320 41670 43008 43155 43840 44448 46032 46080 48615 49320 51856 52608 53760 55560 57540 58338 59264 61376 61440 63431 64512 64820 65760 66672 69048 70144 71680 74080 76720 77784 78912 80640 83340 86016 86310 87680 88896 92064 92160 97230 98640 103712 105216 107520 111120 115080 116676 118528 122752 126862 129024 129640 131520 133344 138096 140288 143360 145845 148160 153440 155568 157824 161280 166680 172620 175360 177792 184128 184320 190293 194460 197280 207424 210432 215040 222240 230160 233352 237056 245504 253724 258048 259280 263040 266688 276192 280576 291690 296320 306880 311136 315648 317155 322560 333360 345240 350720 355584 368256 380586 388920 394560 414848 420864 430080 444017 444480 460320 466704 474112 491008 507448 518560 526080 533376 552384 561152 570879 583380 592640 613760 622272 631296 634310 645120 666720 690480 701440 711168 736512 761172 777840 789120 829696 841728 888034 888960 920640 933408 948224 951465 982016 1014896 1037120 1052160 1066752 1104768 1141758 1166760 1185280 1227520 1244544 1262592 1268620 1290240 1332051 1333440 1380960 1402880 1422336 1473024 1522344 1555680 1578240 1659392 1683456 1776068 1777920 1841280 1866816 1896448 1902930 1964032 2029792 2074240 2104320 2133504 2209536 2220085 2283516 2333520 2370560 2455040 2489088 2525184 2537240 2664102 2666880 2761920 2805760 2844672 2854395 2946048 3044688 3111360 3156480 3318784 3552136 3555840 3682560 3733632 3805860 3928064 3996153 4059584 4148480 4208640 4267008 4419072 4440170 4567032 4667040 4741120 4910080 4978176 5050368 5074480 5328204 5333760 5523840 5689344 5708790 5892096 6089376 6222720 6312960 6637568 6660255 7104272 7111680 7365120 7467264 7611720 7992306 8119168 8296960 8417280 8534016 8838144 8880340 9134064 9334080 9482240 9820160 9956352 10148960 10656408 10667520 11047680 11417580 11784192 12178752 12445440 12625920 13275136 13320510 14208544 14223360 14730240 14934528 15223440 15984612 16238336 16593920 17068032 17676288 17760680 18268128 18668160 19640320 19912704 19980765 20297920 21312816 21335040 22095360 22835160 24357504 24890880 25251840 26641020 28417088 28446720 29460480 29869056 30446880 31969224 32476672 33187840 35352576 35521360 36536256 37336320 39825408 39961530 40595840 42625632 42670080 44190720 45670320 48715008 49781760 53282040 56834176 58920960 59738112 60893760 63938448 64953344 66375680 71042720 73072512 74672640 79923060 81191680 85251264 85340160 88381440 91340640 97430016 99563520 106564080 113668352 119476224 121787520 127876896 129906688 142085440 146145024 149345280 159846120 162383360 170502528 176762880 182681280 194860032 199127040 213128160 227336704 243575040 255753792 259813376 284170880 292290048 298690560 319692240 324766720 341005056 365362560 389720064 426256320 454673408 487150080 511507584 568341760 584580096 597381120 639384480 649533440 682010112 730725120 779440128 852512640 909346816 974300160 1023015168 1136683520 1169160192 1278768960 1299066880 1364020224 1461450240 1705025280 1818693632 1948600320 2046030336 2273367040 2338320384 2557537920 2728040448 2922900480 3410050560 3897200640 4092060672 4546734080 5115075840 5456080896 5845800960 6820101120 8184121344 9093468160 10230151680 11691601920 13640202240 16368242688 20460303360 27280404480 40920606720 81841213440
• Sum of all divisors σ(n): 327279333888
• Sum of proper divisors (its aliquot sum) s(n): 245438120448
• 81841213440 is an abundant number, because the sum of its proper divisors (245438120448) is greater than itself. Its abundance is 163596907008

Bases of 81841213440

• Binary: 1001100001110000111011101000000000000₂
• Hexadecimal: 0x130E1DD000
• Base-36: 11LI58G0

Squares and roots of 81841213440

• 81841213440 squared (81841213440²) is 6697984217331636633600
• 81841213440 cubed (81841213440³) is 548171155948389820994980675584000
• The square root of 81841213440 is 286079.0335554147
• The cube root of 81841213440 is 4341.6754246841

Scales and comparisons

• 81,841,213,440 seconds is equal to 2,602 years, 15 weeks, 3 days, 6 hours, 24 minutes.
• To count from 1 to 81,841,213,440 would take you about five thousand, two hundred 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 81841213440 cubic inches would be around 361.8 feet tall.

Recreational maths with 81841213440

• 81841213440 backwards is 04431214818
• 81841213440 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81841213440's digits is 36
• More coming soon!