128656596800 has 336 divisors, whose sum is σ = 336588933120. Its totient is φ = 48328704000.

The previous prime is 128656596799. The next prime is 128656596821. The reversal of 128656596800 is 8695656821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 533844680 + ... + 533844920.

Almost surely, 2^128656596800 is an apocalyptic number.

128656596800 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 128656596800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168294466560).

128656596800 is an abundant number, since it is smaller than the sum of its proper divisors (207932336320).

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

128656596800 is a wasteful number, since it uses less digits than its factorization.

128656596800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570 (or 555 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 128656596800 in words is "one hundred twenty-eight billion, six hundred fifty-six million, five hundred ninety-six thousand, eight hundred".