12191691163 has 4 divisors (see below), whose sum is σ = 12218844600. Its totient is φ = 12164537728.

The previous prime is 12191691137. The next prime is 12191691181. The reversal of 12191691163 is 36119619121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12191691163 - 2¹⁷ = 12191560091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12191691133) 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, 13576045 + ... + 13576942.

It is an arithmetic number, because the mean of its divisors is an integer number (3054711150).

Almost surely, 2^12191691163 is an apocalyptic number.

12191691163 is a deficient number, since it is larger than the sum of its proper divisors (27153437).

12191691163 is an equidigital number, since it uses as much as digits as its factorization.

12191691163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27153436.

The product of its digits is 17496, while the sum is 40.

The spelling of 12191691163 in words is "twelve billion, one hundred ninety-one million, six hundred ninety-one thousand, one hundred sixty-three".