128964006209 has 2 divisors, whose sum is σ = 128964006210. Its totient is φ = 128964006208.

The previous prime is 128964006191. The next prime is 128964006239. The reversal of 128964006209 is 902600469821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121032322609 + 7931683600 = 347897^2 + 89060^2 .

It is a cyclic number.

It is not a de Polignac number, because 128964006209 - 2¹² = 128964002113 is a prime.

It is not a weakly prime, because it can be changed into another prime (128964006239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64482003104 + 64482003105.

It is an arithmetic number, because the mean of its divisors is an integer number (64482003105).

Almost surely, 2^128964006209 is an apocalyptic number.

It is an amenable number.

128964006209 is a deficient number, since it is larger than the sum of its proper divisors (1).

128964006209 is an equidigital number, since it uses as much as digits as its factorization.

128964006209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The spelling of 128964006209 in words is "one hundred twenty-eight billion, nine hundred sixty-four million, six thousand, two hundred nine".