128800444818 has 16 divisors (see below), whose sum is σ = 272753883360. Its totient is φ = 40407982656.

The previous prime is 128800444771. The next prime is 128800444819. The reversal of 128800444818 is 818444008821.

It is a happy number.

128800444818 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (128800444819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631374628 + ... + 631374831.

It is an arithmetic number, because the mean of its divisors is an integer number (17047117710).

Almost surely, 2^128800444818 is an apocalyptic number.

128800444818 is an abundant number, since it is smaller than the sum of its proper divisors (143953438542).

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

128800444818 is a wasteful number, since it uses less digits than its factorization.

128800444818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1262749481.

The product of its (nonzero) digits is 524288, while the sum is 48.

The spelling of 128800444818 in words is "one hundred twenty-eight billion, eight hundred million, four hundred forty-four thousand, eight hundred eighteen".