256257864168 has 32 divisors (see below), whose sum is σ = 644575005600. Its totient is φ = 84895242048.

The previous prime is 256257864157. The next prime is 256257864179. The reversal of 256257864168 is 861468752652.

256257864168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (256257864157) and next prime (256257864179).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32748883 + ... + 32756706.

It is an arithmetic number, because the mean of its divisors is an integer number (20142968925).

Almost surely, 2^256257864168 is an apocalyptic number.

It is an amenable number.

256257864168 is an abundant number, since it is smaller than the sum of its proper divisors (388317141432).

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

256257864168 is a wasteful number, since it uses less digits than its factorization.

256257864168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65505761 (or 65505757 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 60.

The spelling of 256257864168 in words is "two hundred fifty-six billion, two hundred fifty-seven million, eight hundred sixty-four thousand, one hundred sixty-eight".