128178635711 has 4 divisors (see below), whose sum is σ = 146489869392. Its totient is φ = 109867402032.

The previous prime is 128178635701. The next prime is 128178635777. The reversal of 128178635711 is 117536871821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128178635711 - 2⁶ = 128178635647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128178635711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128178635701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9155616830 + ... + 9155616843.

It is an arithmetic number, because the mean of its divisors is an integer number (36622467348).

Almost surely, 2^128178635711 is an apocalyptic number.

128178635711 is a deficient number, since it is larger than the sum of its proper divisors (18311233681).

128178635711 is an equidigital number, since it uses as much as digits as its factorization.

128178635711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18311233680.

The product of its digits is 564480, while the sum is 50.

The spelling of 128178635711 in words is "one hundred twenty-eight billion, one hundred seventy-eight million, six hundred thirty-five thousand, seven hundred eleven".