128247555989 has 12 divisors (see below), whose sum is σ = 149843152224. Its totient is φ = 109442209464.

The previous prime is 128247555983. The next prime is 128247556007. The reversal of 128247555989 is 989555742821.

It is not a de Polignac number, because 128247555989 - 2³⁶ = 59528079253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128247555983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5753849 + ... + 5776094.

It is an arithmetic number, because the mean of its divisors is an integer number (12486929352).

Almost surely, 2^128247555989 is an apocalyptic number.

It is an amenable number.

128247555989 is a deficient number, since it is larger than the sum of its proper divisors (21595596235).

128247555989 is a wasteful number, since it uses less digits than its factorization.

128247555989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11530184 (or 11530177 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 65.

The spelling of 128247555989 in words is "one hundred twenty-eight billion, two hundred forty-seven million, five hundred fifty-five thousand, nine hundred eighty-nine".