256745756 has 6 divisors (see below), whose sum is σ = 449305080. Its totient is φ = 128372876.

The previous prime is 256745719. The next prime is 256745759. The reversal of 256745756 is 657547652.

256745756 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 256745756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256745759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32093216 + ... + 32093223.

It is an arithmetic number, because the mean of its divisors is an integer number (74884180).

Almost surely, 2^256745756 is an apocalyptic number.

It is an amenable number.

256745756 is a deficient number, since it is larger than the sum of its proper divisors (192559324).

256745756 is a wasteful number, since it uses less digits than its factorization.

256745756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64186443 (or 64186441 counting only the distinct ones).

The product of its digits is 1764000, while the sum is 47.

The square root of 256745756 is about 16023.2879272639. The cubic root of 256745756 is about 635.5763927609.

The spelling of 256745756 in words is "two hundred fifty-six million, seven hundred forty-five thousand, seven hundred fifty-six".