128289275520 has 768 divisors, whose sum is σ = 494627212800. Its totient is φ = 28178841600.

The previous prime is 128289275503. The next prime is 128289275531. The reversal of 128289275520 is 25572982821.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 304724910 + ... + 304725330.

It is an arithmetic number, because the mean of its divisors is an integer number (644045850).

Almost surely, 2^128289275520 is an apocalyptic number.

128289275520 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 128289275520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247313606400).

128289275520 is an abundant number, since it is smaller than the sum of its proper divisors (366337937280).

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

128289275520 is a wasteful number, since it uses less digits than its factorization.

128289275520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 51.

The spelling of 128289275520 in words is "one hundred twenty-eight billion, two hundred eighty-nine million, two hundred seventy-five thousand, five hundred twenty".