18178368418468 has 24 divisors (see below), whose sum is σ = 32993714590200. Its totient is φ = 8753204237568.

The previous prime is 18178368418447. The next prime is 18178368418477. The reversal of 18178368418468 is 86481486387181.

It can be written as a sum of positive squares in 4 ways, for example, as 997078137444 + 17181290281024 = 998538^2 + 4145032^2 .

It is a hoax number, since the sum of its digits (73) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 18178368418468.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201381705 + ... + 201471952.

It is an arithmetic number, because the mean of its divisors is an integer number (1374738107925).

Almost surely, 2^{18178368418468} is an apocalyptic number.

It is an amenable number.

18178368418468 is a deficient number, since it is larger than the sum of its proper divisors (14815346171732).

18178368418468 is a wasteful number, since it uses less digits than its factorization.

18178368418468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402854079 (or 402854077 counting only the distinct ones).

The product of its digits is 396361728, while the sum is 73.

The spelling of 18178368418468 in words is "eighteen trillion, one hundred seventy-eight billion, three hundred sixty-eight million, four hundred eighteen thousand, four hundred sixty-eight".