256563724 has 6 divisors (see below), whose sum is σ = 448986524. Its totient is φ = 128281860.

The previous prime is 256563721. The next prime is 256563731. The reversal of 256563724 is 427365652.

256563724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (256563721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32070462 + ... + 32070469.

Almost surely, 2^256563724 is an apocalyptic number.

It is an amenable number.

256563724 is a deficient number, since it is larger than the sum of its proper divisors (192422800).

256563724 is a wasteful number, since it uses less digits than its factorization.

256563724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64140935 (or 64140933 counting only the distinct ones).

The product of its digits is 302400, while the sum is 40.

The square root of 256563724 is about 16017.6066876422. The cubic root of 256563724 is about 635.4261499720.

The spelling of 256563724 in words is "two hundred fifty-six million, five hundred sixty-three thousand, seven hundred twenty-four".