79138136698 has 8 divisors (see below), whose sum is σ = 118971587700. Its totient is φ = 39480940800.

The previous prime is 79138136641. The next prime is 79138136717. The reversal of 79138136698 is 89663183197.

It can be written as a sum of positive squares in 2 ways, for example, as 76199737849 + 2938398849 = 276043^2 + 54207^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44062653 + ... + 44064448.

Almost surely, 2^79138136698 is an apocalyptic number.

79138136698 is a deficient number, since it is larger than the sum of its proper divisors (39833451002).

79138136698 is a wasteful number, since it uses less digits than its factorization.

79138136698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88127552.

The product of its digits is 11757312, while the sum is 61.

The spelling of 79138136698 in words is "seventy-nine billion, one hundred thirty-eight million, one hundred thirty-six thousand, six hundred ninety-eight".