81398200320

Names of 81398200320

• Cardinal: 81398200320 can be written as Eighty-one billion, three hundred ninety-eight million, two hundred thousand, three hundred twenty.

Scientific notation

• Scientific notation: 8.139820032 × 10¹⁰

Factors of 81398200320

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 18
• Sum of prime factors: 229

Divisors of 81398200320

• Number of divisors d(n): 768
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 32 36 37 40 45 48 54 60 64 72 73 74 80 90 96 108 109 111 120 128 135 144 146 148 160 180 185 192 216 218 219 222 240 256 270 288 292 296 320 327 333 360 365 370 384 432 436 438 444 480 512 540 545 555 576 584 592 640 654 657 666 720 730 740 768 864 872 876 888 960 981 999 1024 1080 1090 1095 1110 1152 1168 1184 1280 1308 1314 1332 1440 1460 1480 1536 1635 1665 1728 1744 1752 1776 1920 1962 1971 1998 2048 2160 2180 2190 2220 2304 2336 2368 2560 2616 2628 2664 2701 2880 2920 2943 2960 3072 3270 3285 3330 3456 3488 3504 3552 3840 3924 3942 3996 4033 4320 4360 4380 4440 4608 4672 4736 4905 4995 5120 5232 5256 5328 5402 5760 5840 5886 5920 6144 6540 6570 6660 6912 6976 7008 7104 7680 7848 7884 7957 7992 8066 8103 8640 8720 8760 8880 9216 9344 9472 9810 9855 9990 10240 10464 10512 10656 10804 11520 11680 11772 11840 12099 13080 13140 13320 13505 13824 13952 14016 14208 14715 15360 15696 15768 15914 15984 16132 16206 17280 17440 17520 17760 18432 18688 18944 19620 19710 19980 20165 20928 21024 21312 21608 23040 23360 23544 23680 23871 24198 24309 26160 26280 26640 27010 27648 27904 28032 28416 29430 30720 31392 31536 31828 31968 32264 32412 34560 34880 35040 35520 36297 37376 37888 39240 39420 39785 39960 40330 40515 41856 42048 42624 43216 46080 46720 47088 47360 47742 48396 48618 52320 52560 53280 54020 55296 55808 56064 56832 58860 60495 62784 63072 63656 63936 64528 64824 69120 69760 70080 71040 71613 72594 72927 74752 75776 78480 78840 79570 79920 80660 81030 83712 84096 85248 86432 92160 93440 94176 94720 95484 96792 97236 104640 105120 106560 108040 108891 111616 112128 113664 117720 119355 120990 121545 125568 126144 127312 127872 129056 129648 138240 139520 140160 142080 143226 145188 145854 149504 156960 157680 159140 159840 161320 162060 167424 168192 170496 172864 181485 186880 188352 189440 190968 193584 194472 209280 210240 213120 214839 216080 217782 223232 224256 227328 235440 238710 241980 243090 251136 252288 254624 255744 258112 259296 276480 279040 280320 284160 286452 290376 291708 294409 313920 315360 318280 319680 322640 324120 334848 336384 340992 345728 358065 362970 364635 373760 376704 378880 381936 387168 388944 418560 420480 426240 429678 432160 435564 448512 470880 477420 483960 486180 502272 504576 509248 511488 516224 518592 544455 558080 560640 568320 572904 580752 583416 588818 627840 630720 636560 639360 645280 648240 669696 672768 681984 691456 716130 725940 729270 747520 753408 763872 774336 777888 837120 840960 852480 859356 864320 871128 883227 941760 954840 967920 972360 1004544 1009152 1018496 1022976 1032448 1037184 1074195 1088910 1116160 1121280 1136640 1145808 1161504 1166832 1177636 1255680 1261440 1273120 1278720 1290560 1296480 1345536 1382912 1432260 1451880 1458540 1472045 1506816 1527744 1548672 1555776 1674240 1681920 1704960 1718712 1728640 1742256 1766454 1883520 1909680 1935840 1944720 2009088 2018304 2036992 2045952 2064896 2074368 2148390 2177820 2242560 2291616 2323008 2333664 2355272 2511360 2522880 2546240 2557440 2581120 2592960 2649681 2765824 2864520 2903760 2917080 2944090 3013632 3055488 3097344 3111552 3348480 3363840 3409920 3437424 3457280 3484512 3532908 3767040 3819360 3871680 3889440 4036608 4073984 4129792 4148736 4296780 4355640 4416135 4583232 4646016 4667328 4710544 5022720 5045760 5092480 5114880 5162240 5185920 5299362 5531648 5729040 5807520 5834160 5888180 6027264 6110976 6194688 6223104 6727680 6874848 6914560 6969024 7065816 7534080 7638720 7743360 7778880 7949043 8147968 8259584 8297472 8593560 8711280 8832270 9166464 9292032 9334656 9421088 10045440 10091520 10184960 10229760 10324480 10371840 10598724 11458080 11615040 11668320 11776360 12221952 12389376 12446208 13248405 13749696 13829120 13938048 14131632 15068160 15277440 15486720 15557760 15898086 16295936 16594944 17187120 17422560 17664540 18332928 18584064 18669312 18842176 20183040 20369920 20648960 20743680 21197448 22916160 23230080 23336640 23552720 24443904 24778752 24892416 26496810 27499392 27658240 27876096 28263264 30136320 30554880 30973440 31115520 31796172 34374240 34845120 35329080 36665856 37168128 37338624 37684352 39745215 40739840 41297920 41487360 42394896 45832320 46460160 46673280 47105440 48887808 49784832 52993620 54998784 55752192 56526528 61109760 61946880 62231040 63592344 68748480 69690240 70658160 73331712 74336256 74677248 75368704 79490430 81479680 82974720 84789792 91664640 92920320 93346560 94210880 105987240 109997568 111504384 113053056 122219520 123893760 124462080 127184688 137496960 139380480 141316320 146663424 149354496 150737408 158980860 169579584 183329280 185840640 186693120 188421760 211974480 219995136 223008768 226106112 244439040 248924160 254369376 274993920 278760960 282632640 301474816 317961720 339159168 366658560 371681280 373386240 376843520 423948960 439990272 452212224 508738752 549987840 557521920 565265280 602949632 635923440 678318336 733317120 746772480 753687040 847897920 904424448 1017477504 1099975680 1115043840 1130530560 1271846880 1356636672 1507374080 1695795840 1808848896 2034955008 2199951360 2261061120 2543693760 2713273344 3014748160 3391591680 4069910016 4522122240 5087387520 5426546688 6783183360 8139820032 9044244480 10174775040 13566366720 16279640064 20349550080 27132733440 40699100160 81398200320
• Sum of all divisors σ(n): 303999696000
• Sum of proper divisors (its aliquot sum) s(n): 222601495680
• 81398200320 is an abundant number, because the sum of its proper divisors (222601495680) is greater than itself. Its abundance is 141203295360

Bases of 81398200320

• Binary: 1001011110011101101011111100000000000₂
• Hexadecimal: 0x12F3B5F800
• Base-36: 11E6DXC0

Squares and roots of 81398200320

• 81398200320 squared (81398200320²) is 6625667015334848102400
• 81398200320 cubed (81398200320³) is 539317370967842477715927072768000
• The square root of 81398200320 is 285303.6983987415
• The cube root of 81398200320 is 4333.8272997973

Scales and comparisons

• 81,398,200,320 seconds is equal to 2,588 years, 10 weeks, 6 days, 19 hours, 12 minutes.
• To count from 1 to 81,398,200,320 would take you about five thousand, one hundred seventy-six 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 81398200320 cubic inches would be around 361.2 feet tall.

Recreational maths with 81398200320

• 81398200320 backwards is 02300289318
• 81398200320 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81398200320's digits is 36
• More coming soon!