2565507058057 has 4 divisors (see below), whose sum is σ = 2569007068420. Its totient is φ = 2562007047696.

The previous prime is 2565507058043. The next prime is 2565507058139. The reversal of 2565507058057 is 7508507055652.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1993825896841 + 571681161216 = 1412029^2 + 756096^2 .

It is a cyclic number.

It is not a de Polignac number, because 2565507058057 - 2⁷ = 2565507057929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2565507057989 and 2565507058007.

It is not an unprimeable number, because it can be changed into a prime (2565507058027) 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, 1750004082 + ... + 1750005547.

It is an arithmetic number, because the mean of its divisors is an integer number (642251767105).

Almost surely, 2^{2565507058057} is an apocalyptic number.

It is an amenable number.

2565507058057 is a deficient number, since it is larger than the sum of its proper divisors (3500010363).

2565507058057 is an equidigital number, since it uses as much as digits as its factorization.

2565507058057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500010362.

The product of its (nonzero) digits is 14700000, while the sum is 55.

The spelling of 2565507058057 in words is "two trillion, five hundred sixty-five billion, five hundred seven million, fifty-eight thousand, fifty-seven".