2565085823 has 4 divisors (see below), whose sum is σ = 2700090360. Its totient is φ = 2430081288.

The previous prime is 2565085781. The next prime is 2565085841. The reversal of 2565085823 is 3285805652.

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

It is a cyclic number.

It is not a de Polignac number, because 2565085823 - 2⁶ = 2565085759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565085883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67502240 + ... + 67502277.

It is an arithmetic number, because the mean of its divisors is an integer number (675022590).

Almost surely, 2^2565085823 is an apocalyptic number.

2565085823 is a deficient number, since it is larger than the sum of its proper divisors (135004537).

2565085823 is a wasteful number, since it uses less digits than its factorization.

2565085823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135004536.

The product of its (nonzero) digits is 576000, while the sum is 44.

The square root of 2565085823 is about 50646.6763272774. The cubic root of 2565085823 is about 1368.8860575800.

The spelling of 2565085823 in words is "two billion, five hundred sixty-five million, eighty-five thousand, eight hundred twenty-three".