128568258128838 has 64 divisors (see below), whose sum is σ = 280685683998720. Its totient is φ = 38936039882400.

The previous prime is 128568258128797. The next prime is 128568258128861. The reversal of 128568258128838 is 838821852865821.

It is a self number, because there is not a number n which added to its sum of digits gives 128568258128838.

It is a congruent 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, 872220123 + ... + 872367513.

It is an arithmetic number, because the mean of its divisors is an integer number (4385713812480).

Almost surely, 2^{128568258128838} is an apocalyptic number.

128568258128838 is an abundant number, since it is smaller than the sum of its proper divisors (152117425869882).

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

128568258128838 is a wasteful number, since it uses less digits than its factorization.

128568258128838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155473.

The product of its digits is 943718400, while the sum is 75.

The spelling of 128568258128838 in words is "one hundred twenty-eight trillion, five hundred sixty-eight billion, two hundred fifty-eight million, one hundred twenty-eight thousand, eight hundred thirty-eight".