2565460165 has 4 divisors (see below), whose sum is σ = 3078552204. Its totient is φ = 2052368128.

The previous prime is 2565460129. The next prime is 2565460189. The reversal of 2565460165 is 5610645652.

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 1515311329 + 1050148836 = 38927^2 + 32406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2565460165 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256546012 + ... + 256546021.

It is an arithmetic number, because the mean of its divisors is an integer number (769638051).

Almost surely, 2^2565460165 is an apocalyptic number.

It is an amenable number.

2565460165 is a deficient number, since it is larger than the sum of its proper divisors (513092039).

2565460165 is an equidigital number, since it uses as much as digits as its factorization.

2565460165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513092038.

The product of its (nonzero) digits is 216000, while the sum is 40.

The square root of 2565460165 is about 50650.3718150222. The cubic root of 2565460165 is about 1368.9526449062.

The spelling of 2565460165 in words is "two billion, five hundred sixty-five million, four hundred sixty thousand, one hundred sixty-five".