18128563168 has 24 divisors (see below), whose sum is σ = 36024172632. Its totient is φ = 8979566976.

The previous prime is 18128563127. The next prime is 18128563181. The reversal of 18128563168 is 86136582181.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 2643855 + ... + 2650702.

It is an arithmetic number, because the mean of its divisors is an integer number (1501007193).

Almost surely, 2^18128563168 is an apocalyptic number.

It is an amenable number.

18128563168 is a deficient number, since it is larger than the sum of its proper divisors (17895609464).

18128563168 is a wasteful number, since it uses less digits than its factorization.

18128563168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5294674 (or 5294666 counting only the distinct ones).

The product of its digits is 552960, while the sum is 49.

The spelling of 18128563168 in words is "eighteen billion, one hundred twenty-eight million, five hundred sixty-three thousand, one hundred sixty-eight".