13215658791 has 16 divisors (see below), whose sum is σ = 18563126400. Its totient is φ = 8340056928.

The previous prime is 13215658751. The next prime is 13215658823. The reversal of 13215658791 is 19785651231.

It is not a de Polignac number, because 13215658791 - 2⁷ = 13215658663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13215658791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13215658751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20316 + ... + 163841.

It is an arithmetic number, because the mean of its divisors is an integer number (1160195400).

Almost surely, 2^13215658791 is an apocalyptic number.

13215658791 is a deficient number, since it is larger than the sum of its proper divisors (5347467609).

13215658791 is a wasteful number, since it uses less digits than its factorization.

13215658791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185438.

The product of its digits is 453600, while the sum is 48.

The spelling of 13215658791 in words is "thirteen billion, two hundred fifteen million, six hundred fifty-eight thousand, seven hundred ninety-one".