128085774231 has 16 divisors (see below), whose sum is σ = 173170763744. Its totient is φ = 84196329984.

The previous prime is 128085774221. The next prime is 128085774263. The reversal of 128085774231 is 132477580821.

It is not a de Polignac number, because 128085774231 - 2⁵ = 128085774199 is a prime.

It is a super-2 number, since 2×128085774231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128085774211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687075 + ... + 853371.

It is an arithmetic number, because the mean of its divisors is an integer number (10823172734).

Almost surely, 2^128085774231 is an apocalyptic number.

128085774231 is a deficient number, since it is larger than the sum of its proper divisors (45084989513).

128085774231 is a wasteful number, since it uses less digits than its factorization.

128085774231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169890.

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 128085774231 in words is "one hundred twenty-eight billion, eighty-five million, seven hundred seventy-four thousand, two hundred thirty-one".