2565566116155 has 40 divisors (see below), whose sum is σ = 5256016937952. Its totient is φ = 1172830223232.

The previous prime is 2565566116133. The next prime is 2565566116213. The reversal of 2565566116155 is 5516116655652.

2565566116155 is a `hidden beast` number, since 2 + 5 + 6 + 5 + 5 + 6 + 6 + 11 + 615 + 5 = 666.

2565566116155 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 2565566116155 - 2⁸ = 2565566115899 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 452477962 + ... + 452483631.

Almost surely, 2^{2565566116155} is an apocalyptic number.

2565566116155 is an abundant number, since it is smaller than the sum of its proper divisors (2690450821797).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2565566116155 is an equidigital number, since it uses as much as digits as its factorization.

2565566116155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904961617 (or 904961608 counting only the distinct ones).

The product of its digits is 8100000, while the sum is 54.

The spelling of 2565566116155 in words is "two trillion, five hundred sixty-five billion, five hundred sixty-six million, one hundred sixteen thousand, one hundred fifty-five".