12566615316 has 12 divisors (see below), whose sum is σ = 29322102432. Its totient is φ = 4188871768.

The previous prime is 12566615311. The next prime is 12566615323. The reversal of 12566615316 is 61351666521.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12566615311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 523608960 + ... + 523608983.

It is an arithmetic number, because the mean of its divisors is an integer number (2443508536).

Almost surely, 2^12566615316 is an apocalyptic number.

It is an amenable number.

12566615316 is an abundant number, since it is smaller than the sum of its proper divisors (16755487116).

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

12566615316 is a wasteful number, since it uses less digits than its factorization.

12566615316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047217950 (or 1047217948 counting only the distinct ones).

The product of its digits is 194400, while the sum is 42.

The spelling of 12566615316 in words is "twelve billion, five hundred sixty-six million, six hundred fifteen thousand, three hundred sixteen".