2565356316645 has 32 divisors (see below), whose sum is σ = 4116008183040. Its totient is φ = 1364382594560.

The previous prime is 2565356316629. The next prime is 2565356316673. The reversal of 2565356316645 is 5466136535652.

It is not a de Polignac number, because 2565356316645 - 2⁴ = 2565356316629 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7687975 + ... + 8014715.

It is an arithmetic number, because the mean of its divisors is an integer number (128625255720).

Almost surely, 2^{2565356316645} is an apocalyptic number.

It is an amenable number.

2565356316645 is a deficient number, since it is larger than the sum of its proper divisors (1550651866395).

2565356316645 is a wasteful number, since it uses less digits than its factorization.

2565356316645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328205.

The product of its digits is 58320000, while the sum is 57.

The spelling of 2565356316645 in words is "two trillion, five hundred sixty-five billion, three hundred fifty-six million, three hundred sixteen thousand, six hundred forty-five".