129868402176 has 180 divisors, whose sum is σ = 387302840496. Its totient is φ = 41891604480.

The previous prime is 129868402163. The next prime is 129868402177. The reversal of 129868402176 is 671204868921.

It is a happy number.

129868402176 is a `hidden beast` number, since 1 + 2 + 9 + 8 + 68 + 402 + 176 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129868402177) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4413625 + ... + 4442951.

Almost surely, 2^129868402176 is an apocalyptic number.

129868402176 is a gapful number since it is divisible by the number (16) 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 129868402176, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193651420248).

129868402176 is an abundant number, since it is smaller than the sum of its proper divisors (257434438320).

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

129868402176 is an equidigital number, since it uses as much as digits as its factorization.

129868402176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29413 (or 29363 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 129868402176 in words is "one hundred twenty-nine billion, eight hundred sixty-eight million, four hundred two thousand, one hundred seventy-six".