163818018018 has 12 divisors (see below), whose sum is σ = 354939039078. Its totient is φ = 54606006000.

The previous prime is 163818018011. The next prime is 163818018071. The reversal of 163818018018 is 810810818361.

163818018018 is a `hidden beast` number, since 1 + 6 + 381 + 80 + 180 + 18 = 666.

It can be written as a sum of positive squares in only one way, i.e., 159102861129 + 4715156889 = 398877^2 + 68667^2 .

It is not an unprimeable number, because it can be changed into a prime (163818018011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4550500483 + ... + 4550500518.

Almost surely, 2^163818018018 is an apocalyptic number.

163818018018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

163818018018 is an abundant number, since it is smaller than the sum of its proper divisors (191121021060).

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

163818018018 is a wasteful number, since it uses less digits than its factorization.

163818018018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9101001009 (or 9101001006 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 45.

The spelling of 163818018018 in words is "one hundred sixty-three billion, eight hundred eighteen million, eighteen thousand, eighteen".