129031028688 has 80 divisors (see below), whose sum is σ = 344576374272. Its totient is φ = 41563200000.

The previous prime is 129031028641. The next prime is 129031028699. The reversal of 129031028688 is 886820130921.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 981238 + ... + 1104938.

Almost surely, 2^129031028688 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 129031028688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172288187136).

129031028688 is an abundant number, since it is smaller than the sum of its proper divisors (215545345584).

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

129031028688 is a wasteful number, since it uses less digits than its factorization.

129031028688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124444 (or 124438 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 48.

The spelling of 129031028688 in words is "one hundred twenty-nine billion, thirty-one million, twenty-eight thousand, six hundred eighty-eight".