13085174591 has 4 divisors (see below), whose sum is σ = 13264423632. Its totient is φ = 12905925552.

The previous prime is 13085174573. The next prime is 13085174621. The reversal of 13085174591 is 19547158031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19547158031 = 593 ⋅32963167.

It is a cyclic number.

It is not a de Polignac number, because 13085174591 - 2⁶ = 13085174527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13085177591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89624411 + ... + 89624556.

It is an arithmetic number, because the mean of its divisors is an integer number (3316105908).

Almost surely, 2^13085174591 is an apocalyptic number.

13085174591 is a deficient number, since it is larger than the sum of its proper divisors (179249041).

13085174591 is an equidigital number, since it uses as much as digits as its factorization.

13085174591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179249040.

The product of its (nonzero) digits is 151200, while the sum is 44.

The spelling of 13085174591 in words is "thirteen billion, eighty-five million, one hundred seventy-four thousand, five hundred ninety-one".