13213852178 has 6 divisors (see below), whose sum is σ = 19821022119. Its totient is φ = 6606844806.

The previous prime is 13213852159. The next prime is 13213852261. The reversal of 13213852178 is 87125831231.

It can be written as a sum of positive squares in only one way, i.e., 6606926089 + 6606926089 = 81283^2 + 81283^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=81283.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 121925 + ... + 203207.

Almost surely, 2^13213852178 is an apocalyptic number.

13213852178 is a deficient number, since it is larger than the sum of its proper divisors (6607169941).

13213852178 is an frugal number, since it uses more digits than its factorization.

13213852178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162568 (or 81285 counting only the distinct ones).

The product of its digits is 80640, while the sum is 41.

The spelling of 13213852178 in words is "thirteen billion, two hundred thirteen million, eight hundred fifty-two thousand, one hundred seventy-eight".