128398672626 has 24 divisors (see below), whose sum is σ = 298723443120. Its totient is φ = 36685334952.

The previous prime is 128398672621. The next prime is 128398672657. The reversal of 128398672626 is 626276893821.

128398672626 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 128398672626.

It is not an unprimeable number, because it can be changed into a prime (128398672621) 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, 218364796 + ... + 218365383.

It is an arithmetic number, because the mean of its divisors is an integer number (12446810130).

Almost surely, 2^128398672626 is an apocalyptic number.

128398672626 is an abundant number, since it is smaller than the sum of its proper divisors (170324770494).

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

128398672626 is a wasteful number, since it uses less digits than its factorization.

128398672626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436730198 (or 436730191 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 60.

The spelling of 128398672626 in words is "one hundred twenty-eight billion, three hundred ninety-eight million, six hundred seventy-two thousand, six hundred twenty-six".