561668832 has 72 divisors (see below), whose sum is σ = 1666710864. Its totient is φ = 179080704.

The previous prime is 561668827. The next prime is 561668869. The reversal of 561668832 is 238866165.

561668832 is a `hidden beast` number, since 561 + 6 + 6 + 8 + 83 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35773 + ... + 49020.

It is an arithmetic number, because the mean of its divisors is an integer number (23148762).

Almost surely, 2^561668832 is an apocalyptic number.

It is an amenable number.

561668832 is an abundant number, since it is smaller than the sum of its proper divisors (1105042032).

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

561668832 is a wasteful number, since it uses less digits than its factorization.

561668832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84832 (or 84821 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 561668832 is about 23699.5534135139. The cubic root of 561668832 is about 825.0750256838.

It can be divided in two parts, 561668 and 832, that added together give a square (562500 = 750²).

The spelling of 561668832 in words is "five hundred sixty-one million, six hundred sixty-eight thousand, eight hundred thirty-two".