12398718933172 has 36 divisors (see below), whose sum is σ = 25631133345216. Its totient is φ = 5202259689120.

The previous prime is 12398718933131. The next prime is 12398718933259. The reversal of 12398718933172 is 27133981789321.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 833688028 + ... + 833702899.

It is an arithmetic number, because the mean of its divisors is an integer number (711975926256).

Almost surely, 2^{12398718933172} is an apocalyptic number.

It is an amenable number.

12398718933172 is an abundant number, since it is smaller than the sum of its proper divisors (13232414412044).

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

12398718933172 is a wasteful number, since it uses less digits than its factorization.

12398718933172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667390968 (or 1667390953 counting only the distinct ones).

The product of its digits is 27433728, while the sum is 64.

The spelling of 12398718933172 in words is "twelve trillion, three hundred ninety-eight billion, seven hundred eighteen million, nine hundred thirty-three thousand, one hundred seventy-two".