79809598853 has 4 divisors (see below), whose sum is σ = 80270926188. Its totient is φ = 79348271520.

The previous prime is 79809598829. The next prime is 79809598889. The reversal of 79809598853 is 35889590897.

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 53727994849 + 26081604004 = 231793^2 + 161498^2 .

It is a cyclic number.

It is not a de Polignac number, because 79809598853 - 2⁸ = 79809598597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79809598753) 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, 230663408 + ... + 230663753.

It is an arithmetic number, because the mean of its divisors is an integer number (20067731547).

Almost surely, 2^79809598853 is an apocalyptic number.

It is an amenable number.

79809598853 is a deficient number, since it is larger than the sum of its proper divisors (461327335).

79809598853 is a wasteful number, since it uses less digits than its factorization.

79809598853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461327334.

The product of its (nonzero) digits is 195955200, while the sum is 71.

The spelling of 79809598853 in words is "seventy-nine billion, eight hundred nine million, five hundred ninety-eight thousand, eight hundred fifty-three".