256545156 has 24 divisors (see below), whose sum is σ = 684120640. Its totient is φ = 73298592.

The previous prime is 256545109. The next prime is 256545167. The reversal of 256545156 is 651545652.

It is a happy number.

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, 1526971 + ... + 1527138.

Almost surely, 2^256545156 is an apocalyptic number.

It is an amenable number.

256545156 is an abundant number, since it is smaller than the sum of its proper divisors (427575484).

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

256545156 is a wasteful number, since it uses less digits than its factorization.

256545156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054123 (or 3054121 counting only the distinct ones).

The product of its digits is 180000, while the sum is 39.

The square root of 256545156 is about 16017.0270649706. The cubic root of 256545156 is about 635.4108206064.

The spelling of 256545156 in words is "two hundred fifty-six million, five hundred forty-five thousand, one hundred fifty-six".