256445156 has 12 divisors (see below), whose sum is σ = 489577200. Its totient is φ = 116565960.

The previous prime is 256445143. The next prime is 256445191. The reversal of 256445156 is 651544652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2914106 + ... + 2914193.

It is an arithmetic number, because the mean of its divisors is an integer number (40798100).

Almost surely, 2^256445156 is an apocalyptic number.

It is an amenable number.

256445156 is a deficient number, since it is larger than the sum of its proper divisors (233132044).

256445156 is a wasteful number, since it uses less digits than its factorization.

256445156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5828314 (or 5828312 counting only the distinct ones).

The product of its digits is 144000, while the sum is 38.

The square root of 256445156 is about 16013.9050827710. The cubic root of 256445156 is about 635.3282499057.

The spelling of 256445156 in words is "two hundred fifty-six million, four hundred forty-five thousand, one hundred fifty-six".