78656073378679 has 2 divisors, whose sum is σ = 78656073378680. Its totient is φ = 78656073378678.

The previous prime is 78656073378611. The next prime is 78656073378823. The reversal of 78656073378679 is 97687337065687.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78656073378679 - 2¹¹ = 78656073376631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78656073378079) 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, 39328036689339 + 39328036689340.

It is an arithmetic number, because the mean of its divisors is an integer number (39328036689340).

Almost surely, 2^{78656073378679} is an apocalyptic number.

78656073378679 is a deficient number, since it is larger than the sum of its proper divisors (1).

78656073378679 is an equidigital number, since it uses as much as digits as its factorization.

78656073378679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13442526720, while the sum is 82.

The spelling of 78656073378679 in words is "seventy-eight trillion, six hundred fifty-six billion, seventy-three million, three hundred seventy-eight thousand, six hundred seventy-nine".