128868537840539 has 24 divisors (see below), whose sum is σ = 150137321677200. Its totient is φ = 110290009816896.

The previous prime is 128868537840509. The next prime is 128868537840541. The reversal of 128868537840539 is 935048735868821.

It is a de Polignac number, because none of the positive numbers 2^k-128868537840539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128868537840539.

It is not an unprimeable number, because it can be changed into a prime (128868537840509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 739903037 + ... + 740077185.

It is an arithmetic number, because the mean of its divisors is an integer number (6255721736550).

It is a 1-persistent number, because it is pandigital, but 2⋅128868537840539 = 257737075681078 is not.

Almost surely, 2^{128868537840539} is an apocalyptic number.

128868537840539 is a deficient number, since it is larger than the sum of its proper divisors (21268783836661).

128868537840539 is a wasteful number, since it uses less digits than its factorization.

128868537840539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197147 (or 197140 counting only the distinct ones).

The product of its (nonzero) digits is 2786918400, while the sum is 77.

The spelling of 128868537840539 in words is "one hundred twenty-eight trillion, eight hundred sixty-eight billion, five hundred thirty-seven million, eight hundred forty thousand, five hundred thirty-nine".