561641324564 has 12 divisors (see below), whose sum is σ = 985023026484. Its totient is φ = 280206174144.

The previous prime is 561641324533. The next prime is 561641324581. The reversal of 561641324564 is 465423146165.

It can be written as a sum of positive squares in 2 ways, for example, as 393944522500 + 167696802064 = 627650^2 + 409508^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 153619979 + ... + 153623634.

It is an arithmetic number, because the mean of its divisors is an integer number (82085252207).

Almost surely, 2^561641324564 is an apocalyptic number.

It is an amenable number.

561641324564 is a deficient number, since it is larger than the sum of its proper divisors (423381701920).

561641324564 is a wasteful number, since it uses less digits than its factorization.

561641324564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307244074 (or 307244072 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 47.

The spelling of 561641324564 in words is "five hundred sixty-one billion, six hundred forty-one million, three hundred twenty-four thousand, five hundred sixty-four".