128568385189 has 2 divisors, whose sum is σ = 128568385190. Its totient is φ = 128568385188.

The previous prime is 128568385171. The next prime is 128568385229. The reversal of 128568385189 is 981583865821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123037488289 + 5530896900 = 350767^2 + 74370^2 .

It is a cyclic number.

It is not a de Polignac number, because 128568385189 - 2¹³ = 128568376997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 128568385189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128568385889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64284192594 + 64284192595.

It is an arithmetic number, because the mean of its divisors is an integer number (64284192595).

Almost surely, 2^128568385189 is an apocalyptic number.

It is an amenable number.

128568385189 is a deficient number, since it is larger than the sum of its proper divisors (1).

128568385189 is an equidigital number, since it uses as much as digits as its factorization.

128568385189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33177600, while the sum is 64.

The spelling of 128568385189 in words is "one hundred twenty-eight billion, five hundred sixty-eight million, three hundred eighty-five thousand, one hundred eighty-nine".