12191594688 has 896 divisors, whose sum is σ = 47410298880. Its totient is φ = 2985984000.

The previous prime is 12191594677. The next prime is 12191594707. The reversal of 12191594688 is 88649519121.

12191594688 is a `hidden beast` number, since 1 + 21 + 9 + 159 + 468 + 8 = 666.

12191594688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 199862178 + ... + 199862238.

It is an arithmetic number, because the mean of its divisors is an integer number (52913280).

Almost surely, 2^12191594688 is an apocalyptic number.

12191594688 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12191594688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23705149440).

12191594688 is an abundant number, since it is smaller than the sum of its proper divisors (35218704192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12191594688 is a wasteful number, since it uses less digits than its factorization.

12191594688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 158 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The spelling of 12191594688 in words is "twelve billion, one hundred ninety-one million, five hundred ninety-four thousand, six hundred eighty-eight".