128843272656 has 180 divisors, whose sum is σ = 419649664512. Its totient is φ = 36795088512.

The previous prime is 128843272643. The next prime is 128843272711. The reversal of 128843272656 is 656272348821.

128843272656 is a `hidden beast` number, since 1 + 2 + 88 + 432 + 72 + 65 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27988851 + ... + 27993453.

Almost surely, 2^128843272656 is an apocalyptic number.

128843272656 is a gapful number since it is divisible by the number (16) 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 128843272656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209824832256).

128843272656 is an abundant number, since it is smaller than the sum of its proper divisors (290806391856).

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

128843272656 is a wasteful number, since it uses less digits than its factorization.

128843272656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8598 (or 8582 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 54.

The spelling of 128843272656 in words is "one hundred twenty-eight billion, eight hundred forty-three million, two hundred seventy-two thousand, six hundred fifty-six".