2565306879 has 8 divisors (see below), whose sum is σ = 3429730560. Its totient is φ = 1705543896.

The previous prime is 2565306847. The next prime is 2565306899. The reversal of 2565306879 is 9786035652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2565306879 - 2⁵ = 2565306847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565306839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1163889 + ... + 1166090.

It is an arithmetic number, because the mean of its divisors is an integer number (428716320).

Almost surely, 2^2565306879 is an apocalyptic number.

2565306879 is a deficient number, since it is larger than the sum of its proper divisors (864423681).

2565306879 is a wasteful number, since it uses less digits than its factorization.

2565306879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330349.

The product of its (nonzero) digits is 2721600, while the sum is 51.

The square root of 2565306879 is about 50648.8586149777. The cubic root of 2565306879 is about 1368.9253794332.

The spelling of 2565306879 in words is "two billion, five hundred sixty-five million, three hundred six thousand, eight hundred seventy-nine".