2565526164 has 12 divisors (see below), whose sum is σ = 5986227744. Its totient is φ = 855175384.

The previous prime is 2565526153. The next prime is 2565526177. The reversal of 2565526164 is 4616255652.

It is a happy number.

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, 106896912 + ... + 106896935.

It is an arithmetic number, because the mean of its divisors is an integer number (498852312).

Almost surely, 2^2565526164 is an apocalyptic number.

It is an amenable number.

2565526164 is an abundant number, since it is smaller than the sum of its proper divisors (3420701580).

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

2565526164 is a wasteful number, since it uses less digits than its factorization.

2565526164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213793854 (or 213793852 counting only the distinct ones).

The product of its digits is 432000, while the sum is 42.

The square root of 2565526164 is about 50651.0233262863. The cubic root of 2565526164 is about 1368.9643840258.

The spelling of 2565526164 in words is "two billion, five hundred sixty-five million, five hundred twenty-six thousand, one hundred sixty-four".