128178635712 has 56 divisors (see below), whose sum is σ = 339245088336. Its totient is φ = 42712885248.

The previous prime is 128178635701. The next prime is 128178635777. The reversal of 128178635712 is 217536871821.

128178635712 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 522858 + ... + 727830.

It is an arithmetic number, because the mean of its divisors is an integer number (6057948006).

Almost surely, 2^128178635712 is an apocalyptic number.

128178635712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128178635712 is an abundant number, since it is smaller than the sum of its proper divisors (211066452624).

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

128178635712 is a wasteful number, since it uses less digits than its factorization.

128178635712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208245 (or 208235 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 51.

The spelling of 128178635712 in words is "one hundred twenty-eight billion, one hundred seventy-eight million, six hundred thirty-five thousand, seven hundred twelve".