129049381832 has 96 divisors (see below), whose sum is σ = 293549832000. Its totient is φ = 52091710848.

The previous prime is 129049381781. The next prime is 129049381843. The reversal of 129049381832 is 238183940921.

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 23 ways as a sum of consecutive naturals, for example, 3478919 + ... + 3515817.

It is an arithmetic number, because the mean of its divisors is an integer number (3057810750).

Almost surely, 2^129049381832 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 129049381832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146774916000).

129049381832 is an abundant number, since it is smaller than the sum of its proper divisors (164500450168).

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

129049381832 is a wasteful number, since it uses less digits than its factorization.

129049381832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37123 (or 37100 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 50.

The spelling of 129049381832 in words is "one hundred twenty-nine billion, forty-nine million, three hundred eighty-one thousand, eight hundred thirty-two".