12566994297 has 72 divisors (see below), whose sum is σ = 20112970752. Its totient is φ = 6970803840.

The previous prime is 12566994289. The next prime is 12566994301. The reversal of 12566994297 is 79249966521.

It is not a de Polignac number, because 12566994297 - 2³ = 12566994289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12566994297.

It is not an unprimeable number, because it can be changed into a prime (12566994697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7790263 + ... + 7791875.

It is an arithmetic number, because the mean of its divisors is an integer number (279346816).

Almost surely, 2^12566994297 is an apocalyptic number.

It is an amenable number.

12566994297 is a deficient number, since it is larger than the sum of its proper divisors (7545976455).

12566994297 is a wasteful number, since it uses less digits than its factorization.

12566994297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791 (or 1767 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 60.

The spelling of 12566994297 in words is "twelve billion, five hundred sixty-six million, nine hundred ninety-four thousand, two hundred ninety-seven".