561464888 has 16 divisors (see below), whose sum is σ = 1053906000. Its totient is φ = 280423296.

The previous prime is 561464861. The next prime is 561464903. The reversal of 561464888 is 888464165.

It is a congruent number.

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, 30833 + ... + 45536.

It is an arithmetic number, because the mean of its divisors is an integer number (65869125).

Almost surely, 2^561464888 is an apocalyptic number.

It is an amenable number.

561464888 is a deficient number, since it is larger than the sum of its proper divisors (492441112).

561464888 is a wasteful number, since it uses less digits than its factorization.

561464888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77294 (or 77290 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 50.

The square root of 561464888 is about 23695.2503257509. The cubic root of 561464888 is about 824.9751510116.

The spelling of 561464888 in words is "five hundred sixty-one million, four hundred sixty-four thousand, eight hundred eighty-eight".