256563468 has 36 divisors (see below), whose sum is σ = 741184080. Its totient is φ = 73303776.

The previous prime is 256563457. The next prime is 256563469. The reversal of 256563468 is 864365652.

256563468 is a `hidden beast` number, since 2 + 5 + 6 + 5 + 634 + 6 + 8 = 666.

256563468 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×256563468² = 131649626224374048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256563469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 508803 + ... + 509306.

Almost surely, 2^256563468 is an apocalyptic number.

256563468 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

256563468 is an abundant number, since it is smaller than the sum of its proper divisors (484620612).

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

256563468 is a wasteful number, since it uses less digits than its factorization.

256563468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018126 (or 1018121 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 256563468 is about 16017.5986964339. The cubic root of 256563468 is about 635.4259386286.

The spelling of 256563468 in words is "two hundred fifty-six million, five hundred sixty-three thousand, four hundred sixty-eight".