79719698636 has 6 divisors (see below), whose sum is σ = 139509472620. Its totient is φ = 39859849316.

The previous prime is 79719698593. The next prime is 79719698657. The reversal of 79719698636 is 63689691797.

It is a super-2 number, since 2×79719698636² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79719698636.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9964962326 + ... + 9964962333.

It is an arithmetic number, because the mean of its divisors is an integer number (23251578770).

Almost surely, 2^79719698636 is an apocalyptic number.

It is an amenable number.

79719698636 is a deficient number, since it is larger than the sum of its proper divisors (59789773984).

79719698636 is a wasteful number, since it uses less digits than its factorization.

79719698636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19929924663 (or 19929924661 counting only the distinct ones).

The product of its digits is 185177664, while the sum is 71.

The spelling of 79719698636 in words is "seventy-nine billion, seven hundred nineteen million, six hundred ninety-eight thousand, six hundred thirty-six".