79775767688 has 16 divisors (see below), whose sum is σ = 149987143680. Its totient is φ = 39779196048.

The previous prime is 79775767681. The next prime is 79775767711. The reversal of 79775767688 is 88676757797.

It is a super-2 number, since 2×79775767688² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79775767681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13582856 + ... + 13588727.

It is an arithmetic number, because the mean of its divisors is an integer number (9374196480).

Almost surely, 2^79775767688 is an apocalyptic number.

It is an amenable number.

79775767688 is a deficient number, since it is larger than the sum of its proper divisors (70211375992).

79775767688 is a wasteful number, since it uses less digits than its factorization.

79775767688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27171956 (or 27171952 counting only the distinct ones).

The product of its digits is 1742549760, while the sum is 77.

The spelling of 79775767688 in words is "seventy-nine billion, seven hundred seventy-five million, seven hundred sixty-seven thousand, six hundred eighty-eight".