13172685338 has 4 divisors (see below), whose sum is σ = 19759028010. Its totient is φ = 6586342668.

The previous prime is 13172685301. The next prime is 13172685343. The reversal of 13172685338 is 83358627131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9734387569 + 3438297769 = 98663^2 + 58637^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13172685292 and 13172685301.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3293171333 + ... + 3293171336.

Almost surely, 2^13172685338 is an apocalyptic number.

13172685338 is a deficient number, since it is larger than the sum of its proper divisors (6586342672).

13172685338 is an equidigital number, since it uses as much as digits as its factorization.

13172685338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6586342671.

The product of its digits is 725760, while the sum is 47.

The spelling of 13172685338 in words is "thirteen billion, one hundred seventy-two million, six hundred eighty-five thousand, three hundred thirty-eight".