256510456 has 16 divisors (see below), whose sum is σ = 481194000. Its totient is φ = 128192064.

The previous prime is 256510447. The next prime is 256510483. The reversal of 256510456 is 654015652.

256510456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×256510456³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

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, 12445 + ... + 25843.

It is an arithmetic number, because the mean of its divisors is an integer number (30074625).

Almost surely, 2^256510456 is an apocalyptic number.

It is an amenable number.

256510456 is a deficient number, since it is larger than the sum of its proper divisors (224683544).

256510456 is a wasteful number, since it uses less digits than its factorization.

256510456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15798 (or 15794 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 256510456 is about 16015.9438060952. The cubic root of 256510456 is about 635.3821710046.

The spelling of 256510456 in words is "two hundred fifty-six million, five hundred ten thousand, four hundred fifty-six".