128078128992 has 96 divisors (see below), whose sum is σ = 382715746560. Its totient is φ = 37124088320.

The previous prime is 128078128991. The next prime is 128078129027. The reversal of 128078128992 is 299821870821.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128078128991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2612367 + ... + 2660942.

It is an arithmetic number, because the mean of its divisors is an integer number (3986622360).

Almost surely, 2^128078128992 is an apocalyptic number.

128078128992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128078128992 is an abundant number, since it is smaller than the sum of its proper divisors (254637617568).

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

128078128992 is a wasteful number, since it uses less digits than its factorization.

128078128992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5273356 (or 5273348 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 57.

The spelling of 128078128992 in words is "one hundred twenty-eight billion, seventy-eight million, one hundred twenty-eight thousand, nine hundred ninety-two".