12786666138472 has 16 divisors (see below), whose sum is σ = 24199064422560. Its totient is φ = 6333582292464.

The previous prime is 12786666138469. The next prime is 12786666138527. The reversal of 12786666138472 is 27483166668721.

It is a junction number, because it is equal to n+sod(n) for n = 12786666138398 and 12786666138407.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7468846188 + ... + 7468847899.

It is an arithmetic number, because the mean of its divisors is an integer number (1512441526410).

Almost surely, 2^{12786666138472} is an apocalyptic number.

It is an amenable number.

12786666138472 is a deficient number, since it is larger than the sum of its proper divisors (11412398284088).

12786666138472 is a wasteful number, since it uses less digits than its factorization.

12786666138472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14937694200 (or 14937694196 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 67.

The spelling of 12786666138472 in words is "twelve trillion, seven hundred eighty-six billion, six hundred sixty-six million, one hundred thirty-eight thousand, four hundred seventy-two".