128391385255 has 16 divisors (see below), whose sum is σ = 176734198080. Its totient is φ = 87712515072.

The previous prime is 128391385249. The next prime is 128391385261. The reversal of 128391385255 is 552583193821.

It is an interprime number because it is at equal distance from previous prime (128391385249) and next prime (128391385261).

It is not a de Polignac number, because 128391385255 - 2⁹ = 128391384743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6809034 + ... + 6827863.

It is an arithmetic number, because the mean of its divisors is an integer number (11045887380).

Almost surely, 2^128391385255 is an apocalyptic number.

128391385255 is a deficient number, since it is larger than the sum of its proper divisors (48342812825).

128391385255 is a wasteful number, since it uses less digits than its factorization.

128391385255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13637178.

The product of its digits is 2592000, while the sum is 52.

The spelling of 128391385255 in words is "one hundred twenty-eight billion, three hundred ninety-one million, three hundred eighty-five thousand, two hundred fifty-five".