129418639168 has 112 divisors (see below), whose sum is σ = 316641829504. Its totient is φ = 51107604480.

The previous prime is 129418639151. The next prime is 129418639177. The reversal of 129418639168 is 861936814921.

It is a tau number, because it is divible by the number of its divisors (112).

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 15 ways as a sum of consecutive naturals, for example, 3306046 + ... + 3344962.

It is an arithmetic number, because the mean of its divisors is an integer number (2827159192).

Almost surely, 2^129418639168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129418639168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158320914752).

129418639168 is an abundant number, since it is smaller than the sum of its proper divisors (187223190336).

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

129418639168 is a wasteful number, since it uses less digits than its factorization.

129418639168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39520 (or 39510 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 58.

The spelling of 129418639168 in words is "one hundred twenty-nine billion, four hundred eighteen million, six hundred thirty-nine thousand, one hundred sixty-eight".