256451456 has 32 divisors (see below), whose sum is σ = 511703400. Its totient is φ = 128024064.

The previous prime is 256451407. The next prime is 256451467. The reversal of 256451456 is 654154652.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111890 + ... + 114158.

Almost surely, 2^256451456 is an apocalyptic number.

It is an amenable number.

256451456 is a deficient number, since it is larger than the sum of its proper divisors (255251944).

256451456 is an equidigital number, since it uses as much as digits as its factorization.

256451456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3166 (or 3154 counting only the distinct ones).

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

The square root of 256451456 is about 16014.1017856138. The cubic root of 256451456 is about 635.3334524934. Note that the first 3 decimals are identical.

The spelling of 256451456 in words is "two hundred fifty-six million, four hundred fifty-one thousand, four hundred fifty-six".