12636635752168 has 8 divisors (see below), whose sum is σ = 23693692035330. Its totient is φ = 6318317876080.

The previous prime is 12636635752133. The next prime is 12636635752189. The reversal of 12636635752168 is 86125753663621.

It can be written as a sum of positive squares in only one way, i.e., 7795922925924 + 4840712826244 = 2792118^2 + 2200162^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 789789734503 + ... + 789789734518.

Almost surely, 2^{12636635752168} is an apocalyptic number.

It is an amenable number.

12636635752168 is a deficient number, since it is larger than the sum of its proper divisors (11057056283162).

12636635752168 is a wasteful number, since it uses less digits than its factorization.

12636635752168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579579469027 (or 1579579469023 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 61.

The spelling of 12636635752168 in words is "twelve trillion, six hundred thirty-six billion, six hundred thirty-five million, seven hundred fifty-two thousand, one hundred sixty-eight".