13085174691 has 6 divisors (see below), whose sum is σ = 18900807900. Its totient is φ = 8723449788.

The previous prime is 13085174689. The next prime is 13085174759. The reversal of 13085174691 is 19647158031.

13085174691 is a `hidden beast` number, since 1 + 3 + 0 + 8 + 517 + 46 + 91 = 666.

It is not a de Polignac number, because 13085174691 - 2¹ = 13085174689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13085174621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 726954141 + ... + 726954158.

It is an arithmetic number, because the mean of its divisors is an integer number (3150134650).

Almost surely, 2^13085174691 is an apocalyptic number.

13085174691 is a deficient number, since it is larger than the sum of its proper divisors (5815633209).

13085174691 is a wasteful number, since it uses less digits than its factorization.

13085174691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453908305 (or 1453908302 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 13085174691 in words is "thirteen billion, eighty-five million, one hundred seventy-four thousand, six hundred ninety-one".