13186887161 has 4 divisors (see below), whose sum is σ = 15070728192. Its totient is φ = 11303046132.

The previous prime is 13186887157. The next prime is 13186887169. The reversal of 13186887161 is 16178868131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16178868131 = 11243 ⋅1439017.

It is not a de Polignac number, because 13186887161 - 2² = 13186887157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13186887169) 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, 941920505 + ... + 941920518.

It is an arithmetic number, because the mean of its divisors is an integer number (3767682048).

Almost surely, 2^13186887161 is an apocalyptic number.

It is an amenable number.

13186887161 is a deficient number, since it is larger than the sum of its proper divisors (1883841031).

13186887161 is an equidigital number, since it uses as much as digits as its factorization.

13186887161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1883841030.

The product of its digits is 387072, while the sum is 50.

The spelling of 13186887161 in words is "thirteen billion, one hundred eighty-six million, eight hundred eighty-seven thousand, one hundred sixty-one".