128835563520 has 832 divisors, whose sum is σ = 472858435584. Its totient is φ = 29758586880.

The previous prime is 128835563513. The next prime is 128835563533. The reversal of 128835563520 is 25365538821.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 128835563520.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 744714154 + ... + 744714326.

Almost surely, 2^128835563520 is an apocalyptic number.

128835563520 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 128835563520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236429217792).

128835563520 is an abundant number, since it is smaller than the sum of its proper divisors (344022872064).

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

128835563520 is a wasteful number, since it uses less digits than its factorization.

128835563520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 254 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 48.

The spelling of 128835563520 in words is "one hundred twenty-eight billion, eight hundred thirty-five million, five hundred sixty-three thousand, five hundred twenty".