2566323636 has 12 divisors (see below), whose sum is σ = 5988088512. Its totient is φ = 855441208.

The previous prime is 2566323583. The next prime is 2566323679. The reversal of 2566323636 is 6363236652.

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, 106930140 + ... + 106930163.

It is an arithmetic number, because the mean of its divisors is an integer number (499007376).

Almost surely, 2^2566323636 is an apocalyptic number.

It is an amenable number.

2566323636 is an abundant number, since it is smaller than the sum of its proper divisors (3421764876).

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

2566323636 is a wasteful number, since it uses less digits than its factorization.

2566323636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213860310 (or 213860308 counting only the distinct ones).

The product of its digits is 699840, while the sum is 42.

The square root of 2566323636 is about 50658.8949346509. The cubic root of 2566323636 is about 1369.1062129787.

The spelling of 2566323636 in words is "two billion, five hundred sixty-six million, three hundred twenty-three thousand, six hundred thirty-six".