79163639665 has 16 divisors (see below), whose sum is σ = 103658667840. Its totient is φ = 57558963520.

The previous prime is 79163639657. The next prime is 79163639773. The reversal of 79163639665 is 56693636197.

It is not a de Polignac number, because 79163639665 - 2³ = 79163639657 is a prime.

It is a super-2 number, since 2×79163639665² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38982 + ... + 399808.

It is an arithmetic number, because the mean of its divisors is an integer number (6478666740).

Almost surely, 2^79163639665 is an apocalyptic number.

It is an amenable number.

79163639665 is a deficient number, since it is larger than the sum of its proper divisors (24495028175).

79163639665 is a wasteful number, since it uses less digits than its factorization.

79163639665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364832.

The product of its digits is 33067440, while the sum is 61.

The spelling of 79163639665 in words is "seventy-nine billion, one hundred sixty-three million, six hundred thirty-nine thousand, six hundred sixty-five".