18799116161 has 4 divisors (see below), whose sum is σ = 21484704192. Its totient is φ = 16113528132.

The previous prime is 18799116143. The next prime is 18799116197. The reversal of 18799116161 is 16161199781.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16161199781 = 6043 ⋅2674367.

It is a cyclic number.

It is not a de Polignac number, because 18799116161 - 2¹⁴ = 18799099777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18799116361) 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, 1342794005 + ... + 1342794018.

It is an arithmetic number, because the mean of its divisors is an integer number (5371176048).

Almost surely, 2^18799116161 is an apocalyptic number.

It is an amenable number.

18799116161 is a deficient number, since it is larger than the sum of its proper divisors (2685588031).

18799116161 is an equidigital number, since it uses as much as digits as its factorization.

18799116161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685588030.

The product of its digits is 163296, while the sum is 50.

The spelling of 18799116161 in words is "eighteen billion, seven hundred ninety-nine million, one hundred sixteen thousand, one hundred sixty-one".