128178635713 has 4 divisors (see below), whose sum is σ = 128193159168. Its totient is φ = 128164112260.

The previous prime is 128178635701. The next prime is 128178635777. The reversal of 128178635713 is 317536871821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128178635713 - 2⁹ = 128178635201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128178615713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7248481 + ... + 7266142.

It is an arithmetic number, because the mean of its divisors is an integer number (32048289792).

Almost surely, 2^128178635713 is an apocalyptic number.

It is an amenable number.

128178635713 is a deficient number, since it is larger than the sum of its proper divisors (14523455).

128178635713 is an equidigital number, since it uses as much as digits as its factorization.

128178635713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14523454.

The product of its digits is 1693440, while the sum is 52.

The spelling of 128178635713 in words is "one hundred twenty-eight billion, one hundred seventy-eight million, six hundred thirty-five thousand, seven hundred thirteen".