18363819618216 has 96 divisors (see below), whose sum is σ = 49767441141600. Its totient is φ = 6117324301440.

The previous prime is 18363819618203. The next prime is 18363819618239. The reversal of 18363819618216 is 61281691836381.

18363819618216 is a `hidden beast` number, since 1 + 8 + 3 + 6 + 3 + 8 + 1 + 9 + 618 + 2 + 1 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 808362090 + ... + 808384806.

It is an arithmetic number, because the mean of its divisors is an integer number (518410845225).

Almost surely, 2^{18363819618216} is an apocalyptic number.

It is an amenable number.

18363819618216 is an abundant number, since it is smaller than the sum of its proper divisors (31403621523384).

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

18363819618216 is a wasteful number, since it uses less digits than its factorization.

18363819618216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29479 (or 29472 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 63.

The spelling of 18363819618216 in words is "eighteen trillion, three hundred sixty-three billion, eight hundred nineteen million, six hundred eighteen thousand, two hundred sixteen".