180018018216 has 64 divisors (see below), whose sum is σ = 505001102400. Its totient is φ = 59411880000.

The previous prime is 180018018197. The next prime is 180018018227. The reversal of 180018018216 is 612810810081.

It is a happy number.

It is a super-2 number, since 2×180018018216² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4104010 + ... + 4147641.

It is an arithmetic number, because the mean of its divisors is an integer number (7890642225).

Almost surely, 2^180018018216 is an apocalyptic number.

It is an amenable number.

180018018216 is an abundant number, since it is smaller than the sum of its proper divisors (324983084184).

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

180018018216 is a wasteful number, since it uses less digits than its factorization.

180018018216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8251767 (or 8251757 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 36.

Adding to 180018018216 its reverse (612810810081), we get a palindrome (792828828297).

The spelling of 180018018216 in words is "one hundred eighty billion, eighteen million, eighteen thousand, two hundred sixteen".