2565168020 has 12 divisors (see below), whose sum is σ = 5386852884. Its totient is φ = 1026067200.

The previous prime is 2565168013. The next prime is 2565168049. The reversal of 2565168020 is 208615652.

2565168020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1696451344 + 868716676 = 41188^2 + 29474^2 .

It is a congruent number.

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, 64129181 + ... + 64129220.

It is an arithmetic number, because the mean of its divisors is an integer number (448904407).

Almost surely, 2^2565168020 is an apocalyptic number.

2565168020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2565168020 is an abundant number, since it is smaller than the sum of its proper divisors (2821684864).

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

2565168020 is a wasteful number, since it uses less digits than its factorization.

2565168020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128258410 (or 128258408 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 2565168020 is about 50647.4877955462. The cubic root of 2565168020 is about 1368.9006791994.

The spelling of 2565168020 in words is "two billion, five hundred sixty-five million, one hundred sixty-eight thousand, twenty".