128539872000 has 720 divisors, whose sum is σ = 484056597024. Its totient is φ = 33868800000.

The previous prime is 128539871953. The next prime is 128539872011. The reversal of 128539872000 is 278935821.

It is a happy number.

128539872000 is a `hidden beast` number, since 12 + 8 + 539 + 87 + 20 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 261791755 + ... + 261792245.

Almost surely, 2^128539872000 is an apocalyptic number.

128539872000 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 128539872000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242028298512).

128539872000 is an abundant number, since it is smaller than the sum of its proper divisors (355516725024).

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

128539872000 is an equidigital number, since it uses as much as digits as its factorization.

128539872000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 128539872000 in words is "one hundred twenty-eight billion, five hundred thirty-nine million, eight hundred seventy-two thousand".