79696317889 has 4 divisors (see below), whose sum is σ = 80100867924. Its totient is φ = 79291767856.

The previous prime is 79696317881. The next prime is 79696317901. The reversal of 79696317889 is 98871369697.

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

It can be written as a sum of positive squares in 2 ways, for example, as 75259692225 + 4436625664 = 274335^2 + 66608^2 .

It is a cyclic number.

It is not a de Polignac number, because 79696317889 - 2³ = 79696317881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79696317881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202274722 + ... + 202275115.

It is an arithmetic number, because the mean of its divisors is an integer number (20025216981).

Almost surely, 2^79696317889 is an apocalyptic number.

It is an amenable number.

79696317889 is a deficient number, since it is larger than the sum of its proper divisors (404550035).

79696317889 is a wasteful number, since it uses less digits than its factorization.

79696317889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404550034.

The product of its digits is 246903552, while the sum is 73.

The spelling of 79696317889 in words is "seventy-nine billion, six hundred ninety-six million, three hundred seventeen thousand, eight hundred eighty-nine".