129392639992 has 64 divisors (see below), whose sum is σ = 302554103040. Its totient is φ = 50399750400.

The previous prime is 129392639939. The next prime is 129392640053. The reversal of 129392639992 is 299936293921.

129392639992 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2572767 + ... + 2622577.

It is an arithmetic number, because the mean of its divisors is an integer number (4727407860).

Almost surely, 2^129392639992 is an apocalyptic number.

It is an amenable number.

129392639992 is an abundant number, since it is smaller than the sum of its proper divisors (173161463048).

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

129392639992 is a wasteful number, since it uses less digits than its factorization.

129392639992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54052 (or 54048 counting only the distinct ones).

The product of its digits is 25509168, while the sum is 64.

The spelling of 129392639992 in words is "one hundred twenty-nine billion, three hundred ninety-two million, six hundred thirty-nine thousand, nine hundred ninety-two".