256356340165552 has 20 divisors (see below), whose sum is σ = 541844082623016. Its totient is φ = 116525609166080.

The previous prime is 256356340165529. The next prime is 256356340165663. The reversal of 256356340165552 is 255561043653652.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 728285057113 + ... + 728285057464.

Almost surely, 2^{256356340165552} is an apocalyptic number.

256356340165552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

256356340165552 is an abundant number, since it is smaller than the sum of its proper divisors (285487742457464).

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

256356340165552 is a wasteful number, since it uses less digits than its factorization.

256356340165552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456570114596 (or 1456570114590 counting only the distinct ones).

The product of its (nonzero) digits is 97200000, while the sum is 58.

The spelling of 256356340165552 in words is "two hundred fifty-six trillion, three hundred fifty-six billion, three hundred forty million, one hundred sixty-five thousand, five hundred fifty-two".