2564544156 has 12 divisors (see below), whose sum is σ = 5983936392. Its totient is φ = 854848048.

The previous prime is 2564544149. The next prime is 2564544179. The reversal of 2564544156 is 6514454652.

It is a tau number, because it is divible by the number of its divisors (12).

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, 106855995 + ... + 106856018.

It is an arithmetic number, because the mean of its divisors is an integer number (498661366).

Almost surely, 2^2564544156 is an apocalyptic number.

It is an amenable number.

2564544156 is an abundant number, since it is smaller than the sum of its proper divisors (3419392236).

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

2564544156 is a wasteful number, since it uses less digits than its factorization.

2564544156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213712020 (or 213712018 counting only the distinct ones).

The product of its digits is 576000, while the sum is 42.

The square root of 2564544156 is about 50641.3285370753. The cubic root of 2564544156 is about 1368.7896952938.

The spelling of 2564544156 in words is "two billion, five hundred sixty-four million, five hundred forty-four thousand, one hundred fifty-six".