81920000000000

Names of 81920000000000

• Cardinal: 81920000000000 can be written as Eighty-one trillion, nine hundred twenty billion.

Scientific notation

• Scientific notation: 8.192 × 10¹³

Factors of 81920000000000

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 33
• Sum of prime factors: 7

Divisors of 81920000000000

• Number of divisors d(n): 264
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 128 160 200 250 256 320 400 500 512 625 640 800 1000 1024 1250 1280 1600 2000 2048 2500 2560 3125 3200 4000 4096 5000 5120 6250 6400 8000 8192 10000 10240 12500 12800 15625 16000 16384 20000 20480 25000 25600 31250 32000 32768 40000 40960 50000 51200 62500 64000 65536 78125 80000 81920 100000 102400 125000 128000 131072 156250 160000 163840 200000 204800 250000 256000 262144 312500 320000 327680 390625 400000 409600 500000 512000 524288 625000 640000 655360 781250 800000 819200 1000000 1024000 1048576 1250000 1280000 1310720 1562500 1600000 1638400 1953125 2000000 2048000 2097152 2500000 2560000 2621440 3125000 3200000 3276800 3906250 4000000 4096000 4194304 5000000 5120000 5242880 6250000 6400000 6553600 7812500 8000000 8192000 8388608 9765625 10000000 10240000 10485760 12500000 12800000 13107200 15625000 16000000 16384000 19531250 20000000 20480000 20971520 25000000 25600000 26214400 31250000 32000000 32768000 39062500 40000000 40960000 41943040 50000000 51200000 52428800 62500000 64000000 65536000 78125000 80000000 81920000 100000000 102400000 104857600 125000000 128000000 131072000 156250000 160000000 163840000 200000000 204800000 209715200 250000000 256000000 262144000 312500000 320000000 327680000 400000000 409600000 500000000 512000000 524288000 625000000 640000000 655360000 800000000 819200000 1000000000 1024000000 1048576000 1250000000 1280000000 1310720000 1600000000 1638400000 2000000000 2048000000 2500000000 2560000000 2621440000 3200000000 3276800000 4000000000 4096000000 5000000000 5120000000 5242880000 6400000000 6553600000 8000000000 8192000000 10000000000 10240000000 12800000000 13107200000 16000000000 16384000000 20000000000 20480000000 25600000000 26214400000 32000000000 32768000000 40000000000 40960000000 51200000000 64000000000 65536000000 80000000000 81920000000 102400000000 128000000000 131072000000 160000000000 163840000000 204800000000 256000000000 320000000000 327680000000 409600000000 512000000000 640000000000 655360000000 819200000000 1024000000000 1280000000000 1638400000000 2048000000000 2560000000000 3276800000000 4096000000000 5120000000000 8192000000000 10240000000000 16384000000000 20480000000000 40960000000000 81920000000000
• Sum of all divisors σ(n): 204799983598665
• Sum of proper divisors (its aliquot sum) s(n): 122879983598665
• 81920000000000 is an abundant number, because the sum of its proper divisors (122879983598665) is greater than itself. Its abundance is 40959983598665

Bases of 81920000000000

• Binary: 10010101000000101111100100000000000000000000000₂
• Hexadecimal: 0x4A817C800000
• Base-36: T1DJ0VZ7K

Squares and roots of 81920000000000

• 81920000000000 squared (81920000000000²) is 6710886400000000000000000000
• 81920000000000 cubed (81920000000000³) is 549755813888000000000000000000000000000000
• The square root of 81920000000000 is 9050966.7991878083
• The cube root of 81920000000000 is 43430.6818655185

Scales and comparisons

• 81,920,000,000,000 seconds is equal to 2,604,802 years, 31 weeks, 3 days, 3 hours, 33 minutes, 20 seconds.
• To count from 1 to 81,920,000,000,000 would take you about six million, five hundred twelve thousand and 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 81920000000000 cubic inches would be around 3619.2 feet tall.

Recreational maths with 81920000000000

• 81920000000000 backwards is 00000000002918
• 81920000000000 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81920000000000's digits is 20
• More coming soon!