128732613072 has 80 divisors (see below), whose sum is σ = 400071298560. Its totient is φ = 34844916096.

The previous prime is 128732613043. The next prime is 128732613083. The reversal of 128732613072 is 270316237821.

It is a happy number.

128732613072 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10076058 + ... + 10088825.

It is an arithmetic number, because the mean of its divisors is an integer number (5000891232).

Almost surely, 2^128732613072 is an apocalyptic number.

128732613072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128732613072 is an abundant number, since it is smaller than the sum of its proper divisors (271338685488).

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

128732613072 is a wasteful number, since it uses less digits than its factorization.

128732613072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20164920 (or 20164914 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The spelling of 128732613072 in words is "one hundred twenty-eight billion, seven hundred thirty-two million, six hundred thirteen thousand, seventy-two".