129081984128688 has 40 divisors (see below), whose sum is σ = 351012412984000. Its totient is φ = 40762731829824.

The previous prime is 129081984128663. The next prime is 129081984128693. The reversal of 129081984128688 is 886821489180921.

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, 70768630738 + ... + 70768632561.

It is an arithmetic number, because the mean of its divisors is an integer number (8775310324600).

Almost surely, 2^{129081984128688} is an apocalyptic number.

It is an amenable number.

129081984128688 is an abundant number, since it is smaller than the sum of its proper divisors (221930428855312).

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

129081984128688 is a wasteful number, since it uses less digits than its factorization.

129081984128688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141537263329 (or 141537263323 counting only the distinct ones).

The product of its (nonzero) digits is 254803968, while the sum is 75.

The spelling of 129081984128688 in words is "one hundred twenty-nine trillion, eighty-one billion, nine hundred eighty-four million, one hundred twenty-eight thousand, six hundred eighty-eight".