129944032180 has 24 divisors (see below), whose sum is σ = 272909145600. Its totient is φ = 51972531360.

The previous prime is 129944032147. The next prime is 129944032247. The reversal of 129944032180 is 81230449921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104416 + ... + 520375.

It is an arithmetic number, because the mean of its divisors is an integer number (11371214400).

Almost surely, 2^129944032180 is an apocalyptic number.

129944032180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129944032180 is an abundant number, since it is smaller than the sum of its proper divisors (142965113420).

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

129944032180 is a wasteful number, since it uses less digits than its factorization.

129944032180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635199 (or 635197 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 129944032180 in words is "one hundred twenty-nine billion, nine hundred forty-four million, thirty-two thousand, one hundred eighty".