561330686 has 64 divisors (see below), whose sum is σ = 1043767296. Its totient is φ = 221205600.

The previous prime is 561330647. The next prime is 561330689. The reversal of 561330686 is 686033165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561330689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 982781 + ... + 983351.

It is an arithmetic number, because the mean of its divisors is an integer number (16308864).

Almost surely, 2^561330686 is an apocalyptic number.

561330686 is a deficient number, since it is larger than the sum of its proper divisors (482436610).

561330686 is a wasteful number, since it uses less digits than its factorization.

561330686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 561330686 is about 23692.4183231683. The cubic root of 561330686 is about 824.9094169294.

The spelling of 561330686 in words is "five hundred sixty-one million, three hundred thirty thousand, six hundred eighty-six".