256563602 has 4 divisors (see below), whose sum is σ = 384845406. Its totient is φ = 128281800.

The previous prime is 256563589. The next prime is 256563611. The reversal of 256563602 is 206365652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 194295721 + 62267881 = 13939^2 + 7891^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64140899 + ... + 64140902.

Almost surely, 2^256563602 is an apocalyptic number.

256563602 is a deficient number, since it is larger than the sum of its proper divisors (128281804).

256563602 is a wasteful number, since it uses less digits than its factorization.

256563602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128281803.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 256563602 is about 16017.6028793325. The cubic root of 256563602 is about 635.4260492537.

The spelling of 256563602 in words is "two hundred fifty-six million, five hundred sixty-three thousand, six hundred two".