18673608786165 has 12 divisors (see below), whose sum is σ = 32367588562764. Its totient is φ = 9959258019264.

The previous prime is 18673608786097. The next prime is 18673608786191. The reversal of 18673608786165 is 56168780637681.

18673608786165 is a `hidden beast` number, since 1 + 8 + 6 + 7 + 3 + 608 + 7 + 8 + 6 + 1 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6239649289041 + 12433959497124 = 2497929^2 + 3526182^2 .

It is not a de Polignac number, because 18673608786165 - 2⁷ = 18673608786037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18673608786093 and 18673608786102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 207484542024 + ... + 207484542113.

It is an arithmetic number, because the mean of its divisors is an integer number (2697299046897).

Almost surely, 2^{18673608786165} is an apocalyptic number.

18673608786165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18673608786165 is a deficient number, since it is larger than the sum of its proper divisors (13693979776599).

18673608786165 is a wasteful number, since it uses less digits than its factorization.

18673608786165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414969084148 (or 414969084145 counting only the distinct ones).

The product of its (nonzero) digits is 487710720, while the sum is 72.

The spelling of 18673608786165 in words is "eighteen trillion, six hundred seventy-three billion, six hundred eight million, seven hundred eighty-six thousand, one hundred sixty-five".