561696256 has 40 divisors (see below), whose sum is σ = 1224334584. Its totient is φ = 255313920.

The previous prime is 561696217. The next prime is 561696257. The reversal of 561696256 is 652696165.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561696257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44235 + ... + 55498.

Almost surely, 2^561696256 is an apocalyptic number.

It is an amenable number.

561696256 is an abundant number, since it is smaller than the sum of its proper divisors (662638328).

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

561696256 is an equidigital number, since it uses as much as digits as its factorization.

561696256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99762 (or 99746 counting only the distinct ones).

The product of its digits is 583200, while the sum is 46.

The square root of 561696256 is about 23700.1319827549. The cubic root of 561696256 is about 825.0884538156.

Subtracting 561696256 from its reverse (652696165), we obtain a palindrome (90999909).

The spelling of 561696256 in words is "five hundred sixty-one million, six hundred ninety-six thousand, two hundred fifty-six".