129388639116 has 72 divisors (see below), whose sum is σ = 333884485312. Its totient is φ = 38968063200.

The previous prime is 129388639109. The next prime is 129388639189. The reversal of 129388639116 is 611936883921.

129388639116 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×129388639116² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36670 + ... + 510021.

Almost surely, 2^129388639116 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 129388639116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166942242656).

129388639116 is an abundant number, since it is smaller than the sum of its proper divisors (204495846196).

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

129388639116 is a wasteful number, since it uses less digits than its factorization.

129388639116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546883 (or 546870 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 57.

The spelling of 129388639116 in words is "one hundred twenty-nine billion, three hundred eighty-eight million, six hundred thirty-nine thousand, one hundred sixteen".