12173040648709 has 2 divisors, whose sum is σ = 12173040648710. Its totient is φ = 12173040648708.

The previous prime is 12173040648661. The next prime is 12173040648731. The reversal of 12173040648709 is 90784604037121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8751669055684 + 3421371593025 = 2958322^2 + 1849695^2 .

It is a cyclic number.

It is not a de Polignac number, because 12173040648709 - 2⁷ = 12173040648581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12173040348709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086520324354 + 6086520324355.

It is an arithmetic number, because the mean of its divisors is an integer number (6086520324355).

Almost surely, 2^{12173040648709} is an apocalyptic number.

It is an amenable number.

12173040648709 is a deficient number, since it is larger than the sum of its proper divisors (1).

12173040648709 is an equidigital number, since it uses as much as digits as its factorization.

12173040648709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The spelling of 12173040648709 in words is "twelve trillion, one hundred seventy-three billion, forty million, six hundred forty-eight thousand, seven hundred nine".