128941999200 has 576 divisors, whose sum is σ = 534340800000. Its totient is φ = 29396183040.

The previous prime is 128941999163. The next prime is 128941999201. The reversal of 128941999200 is 2999149821.

128941999200 is a `hidden beast` number, since 12 + 8 + 9 + 419 + 9 + 9 + 200 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128941999201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 75447946 + ... + 75449654.

It is an arithmetic number, because the mean of its divisors is an integer number (927675000).

Almost surely, 2^128941999200 is an apocalyptic number.

128941999200 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 128941999200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267170400000).

128941999200 is an abundant number, since it is smaller than the sum of its proper divisors (405398800800).

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

128941999200 is a wasteful number, since it uses less digits than its factorization.

128941999200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244 (or 2225 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 54.

The spelling of 128941999200 in words is "one hundred twenty-eight billion, nine hundred forty-one million, nine hundred ninety-nine thousand, two hundred".