561324204564 has 12 divisors (see below), whose sum is σ = 1309756477344. Its totient is φ = 187108068184.

The previous prime is 561324204563. The next prime is 561324204583. The reversal of 561324204564 is 465402423165.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561324204563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23388508512 + ... + 23388508535.

It is an arithmetic number, because the mean of its divisors is an integer number (109146373112).

Almost surely, 2^561324204564 is an apocalyptic number.

It is an amenable number.

561324204564 is an abundant number, since it is smaller than the sum of its proper divisors (748432272780).

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

561324204564 is a wasteful number, since it uses less digits than its factorization.

561324204564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46777017054 (or 46777017052 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

The spelling of 561324204564 in words is "five hundred sixty-one billion, three hundred twenty-four million, two hundred four thousand, five hundred sixty-four".