12191691164 has 24 divisors (see below), whose sum is σ = 22766037840. Its totient is φ = 5695899264.

The previous prime is 12191691137. The next prime is 12191691181. The reversal of 12191691164 is 46119619121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093199 + ... + 1104294.

It is an arithmetic number, because the mean of its divisors is an integer number (948584910).

Almost surely, 2^12191691164 is an apocalyptic number.

It is an amenable number.

12191691164 is a deficient number, since it is larger than the sum of its proper divisors (10574346676).

12191691164 is a wasteful number, since it uses less digits than its factorization.

12191691164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197589 (or 2197587 counting only the distinct ones).

The product of its digits is 23328, while the sum is 41.

The spelling of 12191691164 in words is "twelve billion, one hundred ninety-one million, six hundred ninety-one thousand, one hundred sixty-four".