| Base | Representation |
|---|---|
| bin | 110010011000101011100110… |
| … | …001101100110101110000000 |
| 3 | 1002001121121012212002110000000 |
| 4 | 302120223212031212232000 |
| 5 | 213021132013134332333 |
| 6 | 2103144522450000000 |
| 7 | 64450646024542110 |
| oct | 6230534615465600 |
| 9 | 1061547185073000 |
| 10 | 221598404995968 |
| 11 | 646763a061a720 |
| 12 | 20a2b309576000 |
| 13 | 9685841bc1b80 |
| 14 | 3ca15c47b9040 |
| 15 | 1a9443a495713 |
| hex | c98ae6366b80 |
221598404995968 has 4096 divisors, whose sum is σ = 929477696716800. Its totient is φ = 50769013800960.
The previous prime is 221598404995967. The next prime is 221598404995969. The reversal of 221598404995968 is 869599404895122.
221598404995968 is a `hidden beast` number, since 2 + 2 + 15 + 9 + 8 + 4 + 0 + 4 + 9 + 9 + 596 + 8 = 666.
It is an interprime number because it is at equal distance from previous prime (221598404995967) and next prime (221598404995969).
It is a Harshad number since it is a multiple of its sum of digits (81).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (221598404995967) by changing a digit.
It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 638612117971 + ... + 638612118317.
It is an arithmetic number, because the mean of its divisors is an integer number (226923265800).
Almost surely, 2221598404995968 is an apocalyptic number.
221598404995968 is a gapful number since it is divisible by the number (28) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 221598404995968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (464738848358400).
221598404995968 is an abundant number, since it is smaller than the sum of its proper divisors (707879291720832).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
221598404995968 is a wasteful number, since it uses less digits than its factorization.
221598404995968 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 509 (or 479 counting only the distinct ones).
The product of its (nonzero) digits is 4031078400, while the sum is 81.
The spelling of 221598404995968 in words is "two hundred twenty-one trillion, five hundred ninety-eight billion, four hundred four million, nine hundred ninety-five thousand, nine hundred sixty-eight".
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