561611364 has 24 divisors (see below), whose sum is σ = 1310910720. Its totient is φ = 187134624.

The previous prime is 561611363. The next prime is 561611381. The reversal of 561611364 is 463116165.

It is not an unprimeable number, because it can be changed into a prime (561611363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33342 + ... + 47274.

It is an arithmetic number, because the mean of its divisors is an integer number (54621280).

Almost surely, 2^561611364 is an apocalyptic number.

It is an amenable number.

561611364 is an abundant number, since it is smaller than the sum of its proper divisors (749299356).

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

561611364 is a wasteful number, since it uses less digits than its factorization.

561611364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17299 (or 17297 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 561611364 is about 23698.3409545900. The cubic root of 561611364 is about 825.0468851224.

The spelling of 561611364 in words is "five hundred sixty-one million, six hundred eleven thousand, three hundred sixty-four".