2565428812 has 12 divisors (see below), whose sum is σ = 4489868880. Its totient is φ = 1282609136.

The previous prime is 2565428779. The next prime is 2565428813. The reversal of 2565428812 is 2188245652.

It is not an unprimeable number, because it can be changed into a prime (2565428813) 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, 59889 + ... + 93367.

It is an arithmetic number, because the mean of its divisors is an integer number (374155740).

Almost surely, 2^2565428812 is an apocalyptic number.

It is an amenable number.

2565428812 is a deficient number, since it is larger than the sum of its proper divisors (1924440068).

2565428812 is a wasteful number, since it uses less digits than its factorization.

2565428812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52640 (or 52638 counting only the distinct ones).

The product of its digits is 307200, while the sum is 43.

The square root of 2565428812 is about 50650.0623099321. The cubic root of 2565428812 is about 1368.9470681358.

The spelling of 2565428812 in words is "two billion, five hundred sixty-five million, four hundred twenty-eight thousand, eight hundred twelve".