561530686 has 8 divisors (see below), whose sum is σ = 843632784. Its totient is φ = 280319760.

The previous prime is 561530663. The next prime is 561530719. The reversal of 561530686 is 686035165.

561530686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×561530686² = 630633422639261192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221215 + ... + 223738.

It is an arithmetic number, because the mean of its divisors is an integer number (105454098).

Almost surely, 2^561530686 is an apocalyptic number.

561530686 is a deficient number, since it is larger than the sum of its proper divisors (282102098).

561530686 is a wasteful number, since it uses less digits than its factorization.

561530686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445586.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 561530686 is about 23696.6387067871. The cubic root of 561530686 is about 825.0073759977.

The spelling of 561530686 in words is "five hundred sixty-one million, five hundred thirty thousand, six hundred eighty-six".