561325136 has 40 divisors (see below), whose sum is σ = 1123320960. Its totient is φ = 271572224.

The previous prime is 561325087. The next prime is 561325157. The reversal of 561325136 is 631523165.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62735 + ... + 71121.

It is an arithmetic number, because the mean of its divisors is an integer number (28083024).

Almost surely, 2^561325136 is an apocalyptic number.

It is an amenable number.

561325136 is an abundant number, since it is smaller than the sum of its proper divisors (561995824).

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

561325136 is a wasteful number, since it uses less digits than its factorization.

561325136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8531 (or 8525 counting only the distinct ones).

The product of its digits is 16200, while the sum is 32.

The square root of 561325136 is about 23692.3011968023. The cubic root of 561325136 is about 824.9066982334.

The spelling of 561325136 in words is "five hundred sixty-one million, three hundred twenty-five thousand, one hundred thirty-six".