561430644 has 48 divisors (see below), whose sum is σ = 1447383168. Its totient is φ = 168475648.

The previous prime is 561430613. The next prime is 561430657. The reversal of 561430644 is 446034165.

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 15 ways as a sum of consecutive naturals, for example, 55137 + ... + 64520.

It is an arithmetic number, because the mean of its divisors is an integer number (30153816).

Almost surely, 2^561430644 is an apocalyptic number.

It is an amenable number.

561430644 is an abundant number, since it is smaller than the sum of its proper divisors (885952524).

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

561430644 is a wasteful number, since it uses less digits than its factorization.

561430644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119704 (or 119702 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 561430644 is about 23694.5277226620. The cubic root of 561430644 is about 824.9583788002.

The spelling of 561430644 in words is "five hundred sixty-one million, four hundred thirty thousand, six hundred forty-four".