12191691158 has 8 divisors (see below), whose sum is σ = 18288308952. Its totient is φ = 6095588176.

The previous prime is 12191691137. The next prime is 12191691181. The reversal of 12191691158 is 85119619121.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 62735 + ... + 168282.

It is an arithmetic number, because the mean of its divisors is an integer number (2286038619).

Almost surely, 2^12191691158 is an apocalyptic number.

12191691158 is a deficient number, since it is larger than the sum of its proper divisors (6096617794).

12191691158 is a wasteful number, since it uses less digits than its factorization.

12191691158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257406.

The product of its digits is 38880, while the sum is 44.

The spelling of 12191691158 in words is "twelve billion, one hundred ninety-one million, six hundred ninety-one thousand, one hundred fifty-eight".