2565306880 has 40 divisors (see below), whose sum is σ = 6150730212. Its totient is φ = 1026121728.

The previous prime is 2565306847. The next prime is 2565306899. The reversal of 2565306880 is 886035652.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2208248064 + 357058816 = 46992^2 + 18896^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 498477 + ... + 503596.

Almost surely, 2^2565306880 is an apocalyptic number.

2565306880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2565306880 is an abundant number, since it is smaller than the sum of its proper divisors (3585423332).

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

2565306880 is an equidigital number, since it uses as much as digits as its factorization.

2565306880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002096 (or 1002080 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 43.

The square root of 2565306880 is about 50648.8586248496. The cubic root of 2565306880 is about 1368.9253796111.

The spelling of 2565306880 in words is "two billion, five hundred sixty-five million, three hundred six thousand, eight hundred eighty".