565560516161 has 4 divisors (see below), whose sum is σ = 566198127552. Its totient is φ = 564922904772.

The previous prime is 565560516119. The next prime is 565560516179. The reversal of 565560516161 is 161615065565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 565560516161 - 2⁶ = 565560516097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (565560516361) 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, 318804365 + ... + 318806138.

It is an arithmetic number, because the mean of its divisors is an integer number (141549531888).

Almost surely, 2^565560516161 is an apocalyptic number.

It is an amenable number.

565560516161 is a deficient number, since it is larger than the sum of its proper divisors (637611391).

565560516161 is an equidigital number, since it uses as much as digits as its factorization.

565560516161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637611390.

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 565560516161 in words is "five hundred sixty-five billion, five hundred sixty million, five hundred sixteen thousand, one hundred sixty-one".