78715715159 has 2 divisors, whose sum is σ = 78715715160. Its totient is φ = 78715715158.

The previous prime is 78715715153. The next prime is 78715715171. The reversal of 78715715159 is 95151751787.

It is a weak prime.

It is an emirp because it is prime and its reverse (95151751787) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78715715159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78715715153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39357857579 + 39357857580.

It is an arithmetic number, because the mean of its divisors is an integer number (39357857580).

Almost surely, 2^78715715159 is an apocalyptic number.

78715715159 is a deficient number, since it is larger than the sum of its proper divisors (1).

78715715159 is an equidigital number, since it uses as much as digits as its factorization.

78715715159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3087000, while the sum is 56.

The spelling of 78715715159 in words is "seventy-eight billion, seven hundred fifteen million, seven hundred fifteen thousand, one hundred fifty-nine".