| Base | Representation |
|---|---|
| bin | 11111000011011000100000… |
| … | …10011001000110110000000 |
| 3 | 22221210001222212010102002000 |
| 4 | 33201230100103020312000 |
| 5 | 32422244120333212040 |
| 6 | 401122045233224000 |
| 7 | 20245332465141660 |
| oct | 1741542023106600 |
| 9 | 287701885112060 |
| 10 | 68285958491520 |
| 11 | 1a837a043a2480 |
| 12 | 77aa339402000 |
| 13 | 2c144521bb043 |
| 14 | 12c10b53181a0 |
| 15 | 7d641b5e5130 |
| hex | 3e1b104c8d80 |
68285958491520 has 2048 divisors, whose sum is σ = 310169386598400. Its totient is φ = 13785292800000.
The previous prime is 68285958491519. The next prime is 68285958491521. The reversal of 68285958491520 is 2519485958286.
It is a happy number.
68285958491520 is a `hidden beast` number, since 6 + 8 + 2 + 8 + 5 + 9 + 5 + 8 + 4 + 91 + 520 = 666.
It is an interprime number because it is at equal distance from previous prime (68285958491519) and next prime (68285958491521).
It is a Harshad number since it is a multiple of its sum of digits (72).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (68285958491521) by changing a digit.
It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 13692790467 + ... + 13692795453.
It is an arithmetic number, because the mean of its divisors is an integer number (151449895800).
Almost surely, 268285958491520 is an apocalyptic number.
68285958491520 is a gapful number since it is divisible by the number (60) 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 68285958491520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155084693299200).
68285958491520 is an abundant number, since it is smaller than the sum of its proper divisors (241883428106880).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
68285958491520 is a wasteful number, since it uses less digits than its factorization.
68285958491520 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5325 (or 5307 counting only the distinct ones).
The product of its (nonzero) digits is 497664000, while the sum is 72.
The spelling of 68285958491520 in words is "sixty-eight trillion, two hundred eighty-five billion, nine hundred fifty-eight million, four hundred ninety-one thousand, five hundred twenty".
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