561652566 has 16 divisors (see below), whose sum is σ = 1123596144. Its totient is φ = 187169024.

The previous prime is 561652561. The next prime is 561652573. The reversal of 561652566 is 665256165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561652561) 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, 19186 + ... + 38618.

It is an arithmetic number, because the mean of its divisors is an integer number (70224759).

Almost surely, 2^561652566 is an apocalyptic number.

561652566 is an abundant number, since it is smaller than the sum of its proper divisors (561943578).

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

561652566 is a wasteful number, since it uses less digits than its factorization.

561652566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24255.

The product of its digits is 324000, while the sum is 42.

The square root of 561652566 is about 23699.2102400059. The cubic root of 561652566 is about 825.0670608481.

The spelling of 561652566 in words is "five hundred sixty-one million, six hundred fifty-two thousand, five hundred sixty-six".