128985751200 has 144 divisors (see below), whose sum is σ = 419963183136. Its totient is φ = 34386816000.

The previous prime is 128985751199. The next prime is 128985751211. The reversal of 128985751200 is 2157589821.

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 128985751200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17307475 + ... + 17314925.

It is an arithmetic number, because the mean of its divisors is an integer number (2916410994).

Almost surely, 2^128985751200 is an apocalyptic number.

128985751200 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 128985751200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209981591568).

128985751200 is an abundant number, since it is smaller than the sum of its proper divisors (290977431936).

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

128985751200 is a wasteful number, since it uses less digits than its factorization.

128985751200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14687 (or 14674 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 48.

The spelling of 128985751200 in words is "one hundred twenty-eight billion, nine hundred eighty-five million, seven hundred fifty-one thousand, two hundred".