12971766636 has 72 divisors (see below), whose sum is σ = 33077772000. Its totient is φ = 4286036736.

The previous prime is 12971766559. The next prime is 12971766653. The reversal of 12971766636 is 63666717921.

It is a happy number.

12971766636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4323865 + ... + 4326863.

It is an arithmetic number, because the mean of its divisors is an integer number (459413500).

Almost surely, 2^12971766636 is an apocalyptic number.

It is an amenable number.

12971766636 is an abundant number, since it is smaller than the sum of its proper divisors (20106005364).

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

12971766636 is a wasteful number, since it uses less digits than its factorization.

12971766636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023 (or 4018 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 54.

The spelling of 12971766636 in words is "twelve billion, nine hundred seventy-one million, seven hundred sixty-six thousand, six hundred thirty-six".