561809732 has 24 divisors (see below), whose sum is σ = 1073181312. Its totient is φ = 255216800.

The previous prime is 561809681. The next prime is 561809747. The reversal of 561809732 is 237908165.

It is a self number, because there is not a number n which added to its sum of digits gives 561809732.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109382 + ... + 114402.

It is an arithmetic number, because the mean of its divisors is an integer number (44715888).

Almost surely, 2^561809732 is an apocalyptic number.

It is an amenable number.

561809732 is a deficient number, since it is larger than the sum of its proper divisors (511371580).

561809732 is a wasteful number, since it uses less digits than its factorization.

561809732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7579 (or 7577 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 561809732 is about 23702.5258569630. The cubic root of 561809732 is about 825.1440125700.

The spelling of 561809732 in words is "five hundred sixty-one million, eight hundred nine thousand, seven hundred thirty-two".