561664492 has 12 divisors (see below), whose sum is σ = 983079160. Its totient is φ = 280784736.

The previous prime is 561664471. The next prime is 561664549. The reversal of 561664492 is 294466165.

561664492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37888 + ... + 50584.

Almost surely, 2^561664492 is an apocalyptic number.

It is an amenable number.

561664492 is a deficient number, since it is larger than the sum of its proper divisors (421414668).

561664492 is a wasteful number, since it uses less digits than its factorization.

561664492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23760 (or 23758 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 561664492 is about 23699.4618504303. The cubic root of 561664492 is about 825.0729005675.

The spelling of 561664492 in words is "five hundred sixty-one million, six hundred sixty-four thousand, four hundred ninety-two".