128326434186 has 64 divisors (see below), whose sum is σ = 271871354880. Its totient is φ = 40296674880.

The previous prime is 128326434151. The next prime is 128326434227. The reversal of 128326434186 is 681434623821.

128326434186 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 (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9977736 + ... + 9990588.

It is an arithmetic number, because the mean of its divisors is an integer number (4247989920).

Almost surely, 2^128326434186 is an apocalyptic number.

128326434186 is an abundant number, since it is smaller than the sum of its proper divisors (143544920694).

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

128326434186 is a wasteful number, since it uses less digits than its factorization.

128326434186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13971.

The product of its digits is 1327104, while the sum is 48.

The spelling of 128326434186 in words is "one hundred twenty-eight billion, three hundred twenty-six million, four hundred thirty-four thousand, one hundred eighty-six".