128086925909 has 2 divisors, whose sum is σ = 128086925910. Its totient is φ = 128086925908.

The previous prime is 128086925873. The next prime is 128086925959. The reversal of 128086925909 is 909529680821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65510402500 + 62576523409 = 255950^2 + 250153^2 .

It is a cyclic number.

It is not a de Polignac number, because 128086925909 - 2¹² = 128086921813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128086925959) 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, 64043462954 + 64043462955.

It is an arithmetic number, because the mean of its divisors is an integer number (64043462955).

Almost surely, 2^128086925909 is an apocalyptic number.

It is an amenable number.

128086925909 is a deficient number, since it is larger than the sum of its proper divisors (1).

128086925909 is an equidigital number, since it uses as much as digits as its factorization.

128086925909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5598720, while the sum is 59.

The spelling of 128086925909 in words is "one hundred twenty-eight billion, eighty-six million, nine hundred twenty-five thousand, nine hundred nine".