255851568 has 320 divisors, whose sum is σ = 910259200. Its totient is φ = 67184640.

The previous prime is 255851537. The next prime is 255851611. The reversal of 255851568 is 865158552.

255851568 is a `hidden beast` number, since 2 + 5 + 5 + 85 + 1 + 568 = 666.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3504780 + ... + 3504852.

It is an arithmetic number, because the mean of its divisors is an integer number (2844560).

Almost surely, 2^255851568 is an apocalyptic number.

255851568 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 255851568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455129600).

255851568 is an abundant number, since it is smaller than the sum of its proper divisors (654407632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255851568 is a wasteful number, since it uses less digits than its factorization.

255851568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177 (or 165 counting only the distinct ones).

The product of its digits is 480000, while the sum is 45.

The square root of 255851568 is about 15995.3608274399. The cubic root of 255851568 is about 634.8376777319.

The spelling of 255851568 in words is "two hundred fifty-five million, eight hundred fifty-one thousand, five hundred sixty-eight".