18164736785 has 16 divisors (see below), whose sum is σ = 23481345216. Its totient is φ = 13410007488.

The previous prime is 18164736761. The next prime is 18164736817. The reversal of 18164736785 is 58763746181.

It is a cyclic number.

It is not a de Polignac number, because 18164736785 - 2⁸ = 18164736529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18164736785.

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 15 ways as a sum of consecutive naturals, for example, 191162 + ... + 269948.

It is an arithmetic number, because the mean of its divisors is an integer number (1467584076).

Almost surely, 2^18164736785 is an apocalyptic number.

It is an amenable number.

18164736785 is a deficient number, since it is larger than the sum of its proper divisors (5316608431).

18164736785 is a wasteful number, since it uses less digits than its factorization.

18164736785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82352.

The product of its digits is 6773760, while the sum is 56.

The spelling of 18164736785 in words is "eighteen billion, one hundred sixty-four million, seven hundred thirty-six thousand, seven hundred eighty-five".