18617328785 has 8 divisors (see below), whose sum is σ = 24371775936. Its totient is φ = 13539875440.

The previous prime is 18617328767. The next prime is 18617328797. The reversal of 18617328785 is 58782371681.

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

It is not a de Polignac number, because 18617328785 - 2¹⁰ = 18617327761 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 18617328785.

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 7 ways as a sum of consecutive naturals, for example, 169248389 + ... + 169248498.

It is an arithmetic number, because the mean of its divisors is an integer number (3046471992).

Almost surely, 2^18617328785 is an apocalyptic number.

It is an amenable number.

18617328785 is a deficient number, since it is larger than the sum of its proper divisors (5754447151).

18617328785 is a wasteful number, since it uses less digits than its factorization.

18617328785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338496903.

The product of its digits is 4515840, while the sum is 56.

The spelling of 18617328785 in words is "eighteen billion, six hundred seventeen million, three hundred twenty-eight thousand, seven hundred eighty-five".