79717882871 has 4 divisors (see below), whose sum is σ = 86964963144. Its totient is φ = 72470802600.

The previous prime is 79717882837. The next prime is 79717882873. The reversal of 79717882871 is 17828871797.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79717882871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79717882798 and 79717882807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79717882873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3623540120 + ... + 3623540141.

It is an arithmetic number, because the mean of its divisors is an integer number (21741240786).

Almost surely, 2^79717882871 is an apocalyptic number.

79717882871 is a deficient number, since it is larger than the sum of its proper divisors (7247080273).

79717882871 is a wasteful number, since it uses less digits than its factorization.

79717882871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7247080272.

The product of its digits is 22127616, while the sum is 65.

The spelling of 79717882871 in words is "seventy-nine billion, seven hundred seventeen million, eight hundred eighty-two thousand, eight hundred seventy-one".