128736122800 has 30 divisors (see below), whose sum is σ = 309288535988. Its totient is φ = 51494448960.

The previous prime is 128736122783. The next prime is 128736122807. The reversal of 128736122800 is 8221637821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (128736122807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 160919754 + ... + 160920553.

Almost surely, 2^128736122800 is an apocalyptic number.

128736122800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128736122800 is an abundant number, since it is smaller than the sum of its proper divisors (180552413188).

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

128736122800 is a wasteful number, since it uses less digits than its factorization.

128736122800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321840325 (or 321840314 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 128736122800 in words is "one hundred twenty-eight billion, seven hundred thirty-six million, one hundred twenty-two thousand, eight hundred".