561886680 has 64 divisors (see below), whose sum is σ = 1692741600. Its totient is φ = 149207040.

The previous prime is 561886679. The next prime is 561886747. The reversal of 561886680 is 86688165.

It is a happy number.

It is a super-2 number, since 2×561886680² = 631433282322844800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19206 + ... + 38634.

Almost surely, 2^561886680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561886680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846370800).

561886680 is an abundant number, since it is smaller than the sum of its proper divisors (1130854920).

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

561886680 is a wasteful number, since it uses less digits than its factorization.

561886680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19684 (or 19680 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The square root of 561886680 is about 23704.1490039191. The cubic root of 561886680 is about 825.1816826680.

The spelling of 561886680 in words is "five hundred sixty-one million, eight hundred eighty-six thousand, six hundred eighty".