563566161 has 4 divisors (see below), whose sum is σ = 751421552. Its totient is φ = 375710772.

The previous prime is 563566153. The next prime is 563566181. The reversal of 563566161 is 161665365.

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 not a de Polignac number, because 563566161 - 2³ = 563566153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (563566141) 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, 93927691 + ... + 93927696.

It is an arithmetic number, because the mean of its divisors is an integer number (187855388).

Almost surely, 2^563566161 is an apocalyptic number.

It is an amenable number.

563566161 is a deficient number, since it is larger than the sum of its proper divisors (187855391).

563566161 is a wasteful number, since it uses less digits than its factorization.

563566161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187855390.

The product of its digits is 97200, while the sum is 39.

The square root of 563566161 is about 23739.5484582163. The cubic root of 563566161 is about 826.0030217377.

The spelling of 563566161 in words is "five hundred sixty-three million, five hundred sixty-six thousand, one hundred sixty-one".