561566841 has 16 divisors (see below), whose sum is σ = 817556160. Its totient is φ = 340038720.

The previous prime is 561566807. The next prime is 561566861. The reversal of 561566841 is 148665165.

561566841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561566841 - 2⁶ = 561566777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561566793 and 561566802.

It is not an unprimeable number, because it can be changed into a prime (561566861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33015 + ... + 47043.

It is an arithmetic number, because the mean of its divisors is an integer number (51097260).

Almost surely, 2^561566841 is an apocalyptic number.

It is an amenable number.

561566841 is a deficient number, since it is larger than the sum of its proper divisors (255989319).

561566841 is a wasteful number, since it uses less digits than its factorization.

561566841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15256.

The product of its digits is 172800, while the sum is 42.

The square root of 561566841 is about 23697.4015664165. The cubic root of 561566841 is about 825.0250820657.

The spelling of 561566841 in words is "five hundred sixty-one million, five hundred sixty-six thousand, eight hundred forty-one".