81408000000

Names of 81408000000

• Cardinal: 81408000000 can be written as Eighty-one billion, four hundred eight million.

Scientific notation

• Scientific notation: 8.1408 × 10¹⁰

Factors of 81408000000

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 23
• Sum of prime factors: 63

Divisors of 81408000000

• Number of divisors d(n): 448
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 25 30 32 40 48 50 53 60 64 75 80 96 100 106 120 125 128 150 159 160 192 200 212 240 250 256 265 300 318 320 375 384 400 424 480 500 512 530 600 625 636 640 750 768 795 800 848 960 1000 1024 1060 1200 1250 1272 1280 1325 1500 1536 1590 1600 1696 1875 1920 2000 2048 2120 2400 2500 2544 2560 2650 3000 3072 3125 3180 3200 3392 3750 3840 3975 4000 4096 4240 4800 5000 5088 5120 5300 6000 6144 6250 6360 6400 6625 6784 7500 7680 7950 8000 8192 8480 9375 9600 10000 10176 10240 10600 12000 12288 12500 12720 12800 13250 13568 15000 15360 15625 15900 16000 16384 16960 18750 19200 19875 20000 20352 20480 21200 24000 24576 25000 25440 25600 26500 27136 30000 30720 31250 31800 32000 32768 33125 33920 37500 38400 39750 40000 40704 40960 42400 46875 48000 49152 50000 50880 51200 53000 54272 60000 61440 62500 63600 64000 66250 67840 75000 76800 79500 80000 81408 81920 84800 93750 96000 98304 99375 100000 101760 102400 106000 108544 120000 122880 125000 127200 128000 132500 135680 150000 153600 159000 160000 162816 163840 165625 169600 187500 192000 198750 200000 203520 204800 212000 217088 240000 245760 250000 254400 256000 265000 271360 300000 307200 318000 320000 325632 331250 339200 375000 384000 397500 400000 407040 409600 424000 434176 480000 491520 496875 500000 508800 512000 530000 542720 600000 614400 636000 640000 651264 662500 678400 750000 768000 795000 800000 814080 819200 828125 848000 868352 960000 993750 1000000 1017600 1024000 1060000 1085440 1200000 1228800 1272000 1280000 1302528 1325000 1356800 1500000 1536000 1590000 1600000 1628160 1656250 1696000 1736704 1920000 1987500 2000000 2035200 2048000 2120000 2170880 2400000 2457600 2484375 2544000 2560000 2605056 2650000 2713600 3000000 3072000 3180000 3200000 3256320 3312500 3392000 3840000 3975000 4000000 4070400 4096000 4240000 4341760 4800000 4968750 5088000 5120000 5210112 5300000 5427200 6000000 6144000 6360000 6400000 6512640 6625000 6784000 7680000 7950000 8000000 8140800 8480000 8683520 9600000 9937500 10176000 10240000 10600000 10854400 12000000 12288000 12720000 12800000 13025280 13250000 13568000 15360000 15900000 16000000 16281600 16960000 19200000 19875000 20352000 20480000 21200000 21708800 24000000 25440000 25600000 26050560 26500000 27136000 30720000 31800000 32000000 32563200 33920000 38400000 39750000 40704000 42400000 43417600 48000000 50880000 51200000 53000000 54272000 61440000 63600000 64000000 65126400 67840000 76800000 79500000 81408000 84800000 96000000 101760000 102400000 106000000 108544000 127200000 128000000 130252800 135680000 153600000 159000000 162816000 169600000 192000000 203520000 212000000 217088000 254400000 256000000 271360000 307200000 318000000 325632000 339200000 384000000 407040000 424000000 508800000 512000000 542720000 636000000 651264000 678400000 768000000 814080000 848000000 1017600000 1085440000 1272000000 1356800000 1536000000 1628160000 1696000000 2035200000 2544000000 2713600000 3256320000 3392000000 4070400000 5088000000 5427200000 6784000000 8140800000 10176000000 13568000000 16281600000 20352000000 27136000000 40704000000 81408000000
• Sum of all divisors σ(n): 276472242360
• Sum of proper divisors (its aliquot sum) s(n): 195064242360
• 81408000000 is an abundant number, because the sum of its proper divisors (195064242360) is greater than itself. Its abundance is 113656242360

Bases of 81408000000

• Binary: 1001011110100010010111000000000000000₂
• Hexadecimal: 0x12F44B8000
• Base-36: 11EC7YTC

Squares and roots of 81408000000

• 81408000000 squared (81408000000²) is 6627262464000000000000
• 81408000000 cubed (81408000000³) is 539512182669312000000000000000000
• The square root of 81408000000 is 285320.8720020321
• The cube root of 81408000000 is 4334.0012119817

Scales and comparisons

• 81,408,000,000 seconds is equal to 2,588 years, 27 weeks, 1 day, 5 hours, 20 minutes.
• To count from 1 to 81,408,000,000 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 81408000000 cubic inches would be around 361.2 feet tall.

Recreational maths with 81408000000

• 81408000000 backwards is 00000080418
• The number of decimal digits it has is: 11
• The sum of 81408000000's digits is 21
• More coming soon!