128319717218 has 16 divisors (see below), whose sum is σ = 239974536384. Its totient is φ = 49994694960.

The previous prime is 128319717209. The next prime is 128319717221. The reversal of 128319717218 is 812717913821.

128319717218 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 416622305 + ... + 416622612.

It is an arithmetic number, because the mean of its divisors is an integer number (14998408524).

Almost surely, 2^128319717218 is an apocalyptic number.

128319717218 is a deficient number, since it is larger than the sum of its proper divisors (111654819166).

128319717218 is a wasteful number, since it uses less digits than its factorization.

128319717218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833244937.

The product of its digits is 338688, while the sum is 50.

The spelling of 128319717218 in words is "one hundred twenty-eight billion, three hundred nineteen million, seven hundred seventeen thousand, two hundred eighteen".