561550716 has 18 divisors (see below), whose sum is σ = 1419475512. Its totient is φ = 187183560.

The previous prime is 561550699. The next prime is 561550721. The reversal of 561550716 is 617055165.

561550716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×561550716² = 630678413280225312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 15598631 = 561550716 / (5 + 6 + 1 + 5 + 5 + 0 + 7 + 1 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7799280 + ... + 7799351.

Almost surely, 2^561550716 is an apocalyptic number.

It is an amenable number.

561550716 is an abundant number, since it is smaller than the sum of its proper divisors (857924796).

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

561550716 is a wasteful number, since it uses less digits than its factorization.

561550716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15598641 (or 15598636 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

The square root of 561550716 is about 23697.0613367987. The cubic root of 561550716 is about 825.0171853169.

The spelling of 561550716 in words is "five hundred sixty-one million, five hundred fifty thousand, seven hundred sixteen".