78791739695 has 4 divisors (see below), whose sum is σ = 94550087640. Its totient is φ = 63033391752.

The previous prime is 78791739667. The next prime is 78791739703. The reversal of 78791739695 is 59693719787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 59693719787 = 13 ⋅4591824599.

It is a cyclic number.

It is not a de Polignac number, because 78791739695 - 2²⁸ = 78523304239 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 7879173965 + ... + 7879173974.

It is an arithmetic number, because the mean of its divisors is an integer number (23637521910).

Almost surely, 2^78791739695 is an apocalyptic number.

78791739695 is a deficient number, since it is larger than the sum of its proper divisors (15758347945).

78791739695 is a wasteful number, since it uses less digits than its factorization.

78791739695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15758347944.

The product of its digits is 180033840, while the sum is 71.

The spelling of 78791739695 in words is "seventy-eight billion, seven hundred ninety-one million, seven hundred thirty-nine thousand, six hundred ninety-five".