128564198334 has 96 divisors (see below), whose sum is σ = 346504695264. Its totient is φ = 33846589440.

The previous prime is 128564198309. The next prime is 128564198339. The reversal of 128564198334 is 433891465821.

It is a happy number.

128564198334 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128564198339) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1425279 + ... + 1512794.

It is an arithmetic number, because the mean of its divisors is an integer number (3609423909).

Almost surely, 2^128564198334 is an apocalyptic number.

128564198334 is an abundant number, since it is smaller than the sum of its proper divisors (217940496930).

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

128564198334 is a wasteful number, since it uses less digits than its factorization.

128564198334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2938122 (or 2938119 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The spelling of 128564198334 in words is "one hundred twenty-eight billion, five hundred sixty-four million, one hundred ninety-eight thousand, three hundred thirty-four".