256177046064 has 40 divisors (see below), whose sum is σ = 669226564080. Its totient is φ = 84432882688.

The previous prime is 256177046057. The next prime is 256177046071. The reversal of 256177046064 is 460640771652.

It is an interprime number because it is at equal distance from previous prime (256177046057) and next prime (256177046071).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29978997 + ... + 29987540.

It is an arithmetic number, because the mean of its divisors is an integer number (16730664102).

Almost surely, 2^256177046064 is an apocalyptic number.

256177046064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256177046064 is an abundant number, since it is smaller than the sum of its proper divisors (413049518016).

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

256177046064 is a wasteful number, since it uses less digits than its factorization.

256177046064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59966637 (or 59966631 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 48.

The spelling of 256177046064 in words is "two hundred fifty-six billion, one hundred seventy-seven million, forty-six thousand, sixty-four".