128725368800 has 72 divisors (see below), whose sum is σ = 359143794576. Its totient is φ = 44134410240.

The previous prime is 128725368799. The next prime is 128725368859. The reversal of 128725368800 is 8863527821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11487737 + ... + 11498936.

It is an arithmetic number, because the mean of its divisors is an integer number (4988108258).

Almost surely, 2^128725368800 is an apocalyptic number.

128725368800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128725368800 is an abundant number, since it is smaller than the sum of its proper divisors (230418425776).

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

128725368800 is a wasteful number, since it uses less digits than its factorization.

128725368800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22986700 (or 22986687 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 128725368800 in words is "one hundred twenty-eight billion, seven hundred twenty-five million, three hundred sixty-eight thousand, eight hundred".