18178773168 has 80 divisors (see below), whose sum is σ = 47343398400. Its totient is φ = 6010533120.

The previous prime is 18178773133. The next prime is 18178773169. The reversal of 18178773168 is 86137787181.

It is not an unprimeable number, because it can be changed into a prime (18178773169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3700698 + ... + 3705606.

It is an arithmetic number, because the mean of its divisors is an integer number (591792480).

Almost surely, 2^18178773168 is an apocalyptic number.

It is an amenable number.

18178773168 is an abundant number, since it is smaller than the sum of its proper divisors (29164625232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18178773168 is a wasteful number, since it uses less digits than its factorization.

18178773168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5530 (or 5524 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 57.

The spelling of 18178773168 in words is "eighteen billion, one hundred seventy-eight million, seven hundred seventy-three thousand, one hundred sixty-eight".