180361818 has 96 divisors (see below), whose sum is σ = 484848000. Its totient is φ = 47184768.

The previous prime is 180361807. The next prime is 180361847. The reversal of 180361818 is 818163081.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 243693 + ... + 244431.

It is an arithmetic number, because the mean of its divisors is an integer number (5050500).

Almost surely, 2^180361818 is an apocalyptic number.

180361818 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 180361818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242424000).

180361818 is an abundant number, since it is smaller than the sum of its proper divisors (304486182).

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

180361818 is a wasteful number, since it uses less digits than its factorization.

180361818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916 (or 913 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 180361818 is about 13429.8852563974. The cubic root of 180361818 is about 564.9996794318. Note that the first 3 decimals are identical.

The spelling of 180361818 in words is "one hundred eighty million, three hundred sixty-one thousand, eight hundred eighteen".