2565133660 has 24 divisors (see below), whose sum is σ = 5391950256. Its totient is φ = 1025068800.

The previous prime is 2565133583. The next prime is 2565133679. The reversal of 2565133660 is 663315652.

2565133660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39997 + ... + 82036.

It is an arithmetic number, because the mean of its divisors is an integer number (224664594).

Almost surely, 2^2565133660 is an apocalyptic number.

2565133660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2565133660 is an abundant number, since it is smaller than the sum of its proper divisors (2826816596).

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

2565133660 is a wasteful number, since it uses less digits than its factorization.

2565133660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123093 (or 123091 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 37.

The square root of 2565133660 is about 50647.1485870626. The cubic root of 2565133660 is about 1368.8945671063.

The spelling of 2565133660 in words is "two billion, five hundred sixty-five million, one hundred thirty-three thousand, six hundred sixty".