2565578120 has 64 divisors (see below), whose sum is σ = 6985284480. Its totient is φ = 827882496.

The previous prime is 2565578111. The next prime is 2565578129. The reversal of 2565578120 is 218755652.

2565578120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2565578111) and next prime (2565578129).

It is not an unprimeable number, because it can be changed into a prime (2565578129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264734 + ... + 274253.

It is an arithmetic number, because the mean of its divisors is an integer number (109145070).

Almost surely, 2^2565578120 is an apocalyptic number.

2565578120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2565578120 is an abundant number, since it is smaller than the sum of its proper divisors (4419706360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2565578120 is a wasteful number, since it uses less digits than its factorization.

2565578120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539022 (or 539018 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 41.

The square root of 2565578120 is about 50651.5362057263. The cubic root of 2565578120 is about 1368.9736252014.

The spelling of 2565578120 in words is "two billion, five hundred sixty-five million, five hundred seventy-eight thousand, one hundred twenty".