18116363861 has 8 divisors (see below), whose sum is σ = 18144452664. Its totient is φ = 18088297920.

The previous prime is 18116363843. The next prime is 18116363869. The reversal of 18116363861 is 16836361181.

It can be written as a sum of positive squares in 4 ways, for example, as 9473128900 + 8643234961 = 97330^2 + 92969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18116363861 - 2¹⁰ = 18116362837 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 (18116363869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2174075 + ... + 2182391.

It is an arithmetic number, because the mean of its divisors is an integer number (2268056583).

Almost surely, 2^18116363861 is an apocalyptic number.

It is an amenable number.

18116363861 is a deficient number, since it is larger than the sum of its proper divisors (28088803).

18116363861 is a wasteful number, since it uses less digits than its factorization.

18116363861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11431.

The product of its digits is 124416, while the sum is 44.

The spelling of 18116363861 in words is "eighteen billion, one hundred sixteen million, three hundred sixty-three thousand, eight hundred sixty-one".