13171848685 has 4 divisors (see below), whose sum is σ = 15806218428. Its totient is φ = 10537478944.

The previous prime is 13171848671. The next prime is 13171848821. The reversal of 13171848685 is 58684817131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7662201156 + 5509647529 = 87534^2 + 74227^2 .

It is a cyclic number.

It is not a de Polignac number, because 13171848685 - 2¹¹ = 13171846637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1317184864 + ... + 1317184873.

It is an arithmetic number, because the mean of its divisors is an integer number (3951554607).

Almost surely, 2^13171848685 is an apocalyptic number.

It is an amenable number.

13171848685 is a deficient number, since it is larger than the sum of its proper divisors (2634369743).

13171848685 is an equidigital number, since it uses as much as digits as its factorization.

13171848685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2634369742.

The product of its digits is 1290240, while the sum is 52.

The spelling of 13171848685 in words is "thirteen billion, one hundred seventy-one million, eight hundred forty-eight thousand, six hundred eighty-five".