79883604865 has 4 divisors (see below), whose sum is σ = 95860325844. Its totient is φ = 63906883888.

The previous prime is 79883604847. The next prime is 79883604907. The reversal of 79883604865 is 56840638897.

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 11131094016 + 68752510849 = 105504^2 + 262207^2 .

It is a cyclic number.

It is not a de Polignac number, because 79883604865 - 2¹³ = 79883596673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79883604797 and 79883604806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7988360482 + ... + 7988360491.

It is an arithmetic number, because the mean of its divisors is an integer number (23965081461).

Almost surely, 2^79883604865 is an apocalyptic number.

It is an amenable number.

79883604865 is a deficient number, since it is larger than the sum of its proper divisors (15976720979).

79883604865 is a wasteful number, since it uses less digits than its factorization.

79883604865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15976720978.

The product of its (nonzero) digits is 69672960, while the sum is 64.

The spelling of 79883604865 in words is "seventy-nine billion, eight hundred eighty-three million, six hundred four thousand, eight hundred sixty-five".