256081056 has 240 divisors, whose sum is σ = 863962848. Its totient is φ = 65856000.

The previous prime is 256081043. The next prime is 256081061. The reversal of 256081056 is 650180652.

256081056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2535406 + ... + 2535506.

Almost surely, 2^256081056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256081056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (431981424).

256081056 is an abundant number, since it is smaller than the sum of its proper divisors (607881792).

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

256081056 is a wasteful number, since it uses less digits than its factorization.

256081056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 256081056 is about 16002.5327995290. The cubic root of 256081056 is about 635.0274284967.

The spelling of 256081056 in words is "two hundred fifty-six million, eighty-one thousand, fifty-six".