78083814709 has 2 divisors, whose sum is σ = 78083814710. Its totient is φ = 78083814708.

The previous prime is 78083814703. The next prime is 78083814859. The reversal of 78083814709 is 90741838087.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69328469809 + 8755344900 = 263303^2 + 93570^2 .

It is a cyclic number.

It is not a de Polignac number, because 78083814709 - 2¹¹ = 78083812661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78083814709.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78083814703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39041907354 + 39041907355.

It is an arithmetic number, because the mean of its divisors is an integer number (39041907355).

Almost surely, 2^78083814709 is an apocalyptic number.

It is an amenable number.

78083814709 is a deficient number, since it is larger than the sum of its proper divisors (1).

78083814709 is an equidigital number, since it uses as much as digits as its factorization.

78083814709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 55.

The spelling of 78083814709 in words is "seventy-eight billion, eighty-three million, eight hundred fourteen thousand, seven hundred nine".