2565566116163 has 4 divisors (see below), whose sum is σ = 2565605456568. Its totient is φ = 2565526775760.

The previous prime is 2565566116133. The next prime is 2565566116213. The reversal of 2565566116163 is 3616116655652.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2565566116163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565566116133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19572218 + ... + 19702863.

It is an arithmetic number, because the mean of its divisors is an integer number (641401364142).

Almost surely, 2^{2565566116163} is an apocalyptic number.

2565566116163 is a deficient number, since it is larger than the sum of its proper divisors (39340405).

2565566116163 is an equidigital number, since it uses as much as digits as its factorization.

2565566116163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39340404.

The product of its digits is 5832000, while the sum is 53.

The spelling of 2565566116163 in words is "two trillion, five hundred sixty-five billion, five hundred sixty-six million, one hundred sixteen thousand, one hundred sixty-three".