12129591168 has 48 divisors (see below), whose sum is σ = 34904165400. Its totient is φ = 4043196672.

The previous prime is 12129591161. The next prime is 12129591283. The reversal of 12129591168 is 86119592121.

12129591168 is a `hidden beast` number, since 1 + 21 + 29 + 591 + 16 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12129591161) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 5263428 + ... + 5265731.

Almost surely, 2^12129591168 is an apocalyptic number.

12129591168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12129591168 is an abundant number, since it is smaller than the sum of its proper divisors (22774574232).

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

12129591168 is a wasteful number, since it uses less digits than its factorization.

12129591168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10529179 (or 10529164 counting only the distinct ones).

The product of its digits is 77760, while the sum is 45.

The spelling of 12129591168 in words is "twelve billion, one hundred twenty-nine million, five hundred ninety-one thousand, one hundred sixty-eight".