79863717171 has 24 divisors (see below), whose sum is σ = 127866077184. Its totient is φ = 44164265040.

The previous prime is 79863717169. The next prime is 79863717187. The reversal of 79863717171 is 17171736897.

It is not a de Polignac number, because 79863717171 - 2¹ = 79863717169 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79863717161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8758195 + ... + 8767308.

It is an arithmetic number, because the mean of its divisors is an integer number (5327753216).

Almost surely, 2^79863717171 is an apocalyptic number.

79863717171 is a deficient number, since it is larger than the sum of its proper divisors (48002360013).

79863717171 is a wasteful number, since it uses less digits than its factorization.

79863717171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17525551 (or 17525544 counting only the distinct ones).

The product of its digits is 3111696, while the sum is 57.

The spelling of 79863717171 in words is "seventy-nine billion, eight hundred sixty-three million, seven hundred seventeen thousand, one hundred seventy-one".