561165607 has 4 divisors (see below), whose sum is σ = 562993816. Its totient is φ = 559337400.

The previous prime is 561165599. The next prime is 561165623. The reversal of 561165607 is 706561165.

561165607 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 561165607 - 2³ = 561165599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561165307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913644 + ... + 914257.

It is an arithmetic number, because the mean of its divisors is an integer number (140748454).

Almost surely, 2^561165607 is an apocalyptic number.

561165607 is a deficient number, since it is larger than the sum of its proper divisors (1828209).

561165607 is a wasteful number, since it uses less digits than its factorization.

561165607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828208.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 561165607 is about 23688.9342732002. The cubic root of 561165607 is about 824.8285444738.

The spelling of 561165607 in words is "five hundred sixty-one million, one hundred sixty-five thousand, six hundred seven".