13155113891 has 4 divisors (see below), whose sum is σ = 13321634400. Its totient is φ = 12988593384.

The previous prime is 13155113887. The next prime is 13155113921. The reversal of 13155113891 is 19831155131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19831155131 = 1049 ⋅18904819.

It is a cyclic number.

It is not a de Polignac number, because 13155113891 - 2² = 13155113887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13155113831) 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, 83260136 + ... + 83260293.

It is an arithmetic number, because the mean of its divisors is an integer number (3330408600).

Almost surely, 2^13155113891 is an apocalyptic number.

13155113891 is a deficient number, since it is larger than the sum of its proper divisors (166520509).

13155113891 is an equidigital number, since it uses as much as digits as its factorization.

13155113891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166520508.

The product of its digits is 16200, while the sum is 38.

The spelling of 13155113891 in words is "thirteen billion, one hundred fifty-five million, one hundred thirteen thousand, eight hundred ninety-one".