128855858320 has 160 divisors (see below), whose sum is σ = 366319054080. Its totient is φ = 41167595520.

The previous prime is 128855858309. The next prime is 128855858347. The reversal of 128855858320 is 23858558821.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 549774 + ... + 748306.

It is an arithmetic number, because the mean of its divisors is an integer number (2289494088).

Almost surely, 2^128855858320 is an apocalyptic number.

128855858320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128855858320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183159527040).

128855858320 is an abundant number, since it is smaller than the sum of its proper divisors (237463195760).

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

128855858320 is a wasteful number, since it uses less digits than its factorization.

128855858320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198633 (or 198627 counting only the distinct ones).

The product of its (nonzero) digits is 6144000, while the sum is 55.

The spelling of 128855858320 in words is "one hundred twenty-eight billion, eight hundred fifty-five million, eight hundred fifty-eight thousand, three hundred twenty".