79663836697 has 4 divisors (see below), whose sum is σ = 84349944756. Its totient is φ = 74977728640.

The previous prime is 79663836689. The next prime is 79663836701.

79663836697 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69619988736 + 10043847961 = 263856^2 + 100219^2 .

It is a cyclic number.

It is not a de Polignac number, because 79663836697 - 2³ = 79663836689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79663836617) 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 in 3 ways as a sum of consecutive naturals, for example, 2343054004 + ... + 2343054037.

It is an arithmetic number, because the mean of its divisors is an integer number (21087486189).

Almost surely, 2^79663836697 is an apocalyptic number.

It is an amenable number.

79663836697 is a deficient number, since it is larger than the sum of its proper divisors (4686108059).

79663836697 is a wasteful number, since it uses less digits than its factorization.

79663836697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4686108058.

The product of its digits is 370355328, while the sum is 70.

The spelling of 79663836697 in words is "seventy-nine billion, six hundred sixty-three million, eight hundred thirty-six thousand, six hundred ninety-seven".