256623313660608 has 56 divisors (see below), whose sum is σ = 678983851852288. Its totient is φ = 85540936432896.

The previous prime is 256623313660607. The next prime is 256623313660621. The reversal of 256623313660608 is 806066313326652.

256623313660608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256623313660608² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256623313660607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131531385 + ... + 133468167.

Almost surely, 2^{256623313660608} is an apocalyptic number.

It is an amenable number.

256623313660608 is an abundant number, since it is smaller than the sum of its proper divisors (422360538191680).

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

256623313660608 is a wasteful number, since it uses less digits than its factorization.

256623313660608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2626901 (or 2626891 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 57.

The spelling of 256623313660608 in words is "two hundred fifty-six trillion, six hundred twenty-three billion, three hundred thirteen million, six hundred sixty thousand, six hundred eight".