18117335665 has 32 divisors (see below), whose sum is σ = 25922929536. Its totient is φ = 11981122560.

The previous prime is 18117335651. The next prime is 18117335707. The reversal of 18117335665 is 56653371181.

It is not a de Polignac number, because 18117335665 - 2⁹ = 18117335153 is a prime.

It is a Duffinian number.

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 31 ways as a sum of consecutive naturals, for example, 141192 + ... + 237001.

It is an arithmetic number, because the mean of its divisors is an integer number (810091548).

Almost surely, 2^18117335665 is an apocalyptic number.

It is an amenable number.

18117335665 is a deficient number, since it is larger than the sum of its proper divisors (7805593871).

18117335665 is a wasteful number, since it uses less digits than its factorization.

18117335665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378289.

The product of its digits is 453600, while the sum is 46.

The spelling of 18117335665 in words is "eighteen billion, one hundred seventeen million, three hundred thirty-five thousand, six hundred sixty-five".