256563160 has 64 divisors (see below), whose sum is σ = 688435200. Its totient is φ = 84137856.

The previous prime is 256563149. The next prime is 256563163. The reversal of 256563160 is 61365652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256563163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13480 + ... + 26359.

It is an arithmetic number, because the mean of its divisors is an integer number (10756800).

Almost surely, 2^256563160 is an apocalyptic number.

256563160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256563160 is an abundant number, since it is smaller than the sum of its proper divisors (431872040).

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

256563160 is a wasteful number, since it uses less digits than its factorization.

256563160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39880 (or 39876 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 256563160 is about 16017.5890820061. The cubic root of 256563160 is about 635.4256843559.

The spelling of 256563160 in words is "two hundred fifty-six million, five hundred sixty-three thousand, one hundred sixty".