761716243310809 has 2 divisors, whose sum is σ = 761716243310810. Its totient is φ = 761716243310808.

The previous prime is 761716243310723. The next prime is 761716243310837. The reversal of 761716243310809 is 908013342617167.

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., 656886494261209 + 104829749049600 = 25629797^2 + 10238640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-761716243310809 is a prime.

It is not a weakly prime, because it can be changed into another prime (761716243310849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 380858121655404 + 380858121655405.

It is an arithmetic number, because the mean of its divisors is an integer number (380858121655405).

Almost surely, 2^{761716243310809} is an apocalyptic number.

It is an amenable number.

761716243310809 is a deficient number, since it is larger than the sum of its proper divisors (1).

761716243310809 is an equidigital number, since it uses as much as digits as its factorization.

761716243310809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9144576, while the sum is 58.

The spelling of 761716243310809 in words is "seven hundred sixty-one trillion, seven hundred sixteen billion, two hundred forty-three million, three hundred ten thousand, eight hundred nine".