128798189446529 has 2 divisors, whose sum is σ = 128798189446530. Its totient is φ = 128798189446528.

The previous prime is 128798189446501. The next prime is 128798189446561. The reversal of 128798189446529 is 925644981897821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121220980801600 + 7577208644929 = 11010040^2 + 2752673^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128798189446529 is a prime.

It is not a weakly prime, because it can be changed into another prime (128798186446529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64399094723264 + 64399094723265.

It is an arithmetic number, because the mean of its divisors is an integer number (64399094723265).

Almost surely, 2^{128798189446529} is an apocalyptic number.

It is an amenable number.

128798189446529 is a deficient number, since it is larger than the sum of its proper divisors (1).

128798189446529 is an equidigital number, since it uses as much as digits as its factorization.

128798189446529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5016453120, while the sum is 83.

The spelling of 128798189446529 in words is "one hundred twenty-eight trillion, seven hundred ninety-eight billion, one hundred eighty-nine million, four hundred forty-six thousand, five hundred twenty-nine".