128684041920 has 168 divisors, whose sum is σ = 505850920224. Its totient is φ = 29413490688.

The previous prime is 128684041919. The next prime is 128684041943. The reversal of 128684041920 is 29140486821.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (45).

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 23 ways as a sum of consecutive naturals, for example, 3171409 + ... + 3211728.

Almost surely, 2^128684041920 is an apocalyptic number.

128684041920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128684041920 is an abundant number, since it is smaller than the sum of its proper divisors (377166878304).

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

128684041920 is a wasteful number, since it uses less digits than its factorization.

128684041920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6383167 (or 6383154 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 128684041920 in words is "one hundred twenty-eight billion, six hundred eighty-four million, forty-one thousand, nine hundred twenty".