128755522155 has 24 divisors (see below), whose sum is σ = 223074660528. Its totient is φ = 63387332736.

The previous prime is 128755522141. The next prime is 128755522157. The reversal of 128755522155 is 551225557821.

It is not a de Polignac number, because 128755522155 - 2⁵ = 128755522123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128755522157) 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, 25393032 + ... + 25398101.

It is an arithmetic number, because the mean of its divisors is an integer number (9294777522).

Almost surely, 2^128755522155 is an apocalyptic number.

128755522155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128755522155 is a deficient number, since it is larger than the sum of its proper divisors (94319138373).

128755522155 is a wasteful number, since it uses less digits than its factorization.

128755522155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50791167 (or 50791154 counting only the distinct ones).

The product of its digits is 1400000, while the sum is 48.

The spelling of 128755522155 in words is "one hundred twenty-eight billion, seven hundred fifty-five million, five hundred twenty-two thousand, one hundred fifty-five".