216181842364530 has 240 divisors, whose sum is σ = 683790961316760. Its totient is φ = 48857789578752.

The previous prime is 216181842364517. The next prime is 216181842364577. The reversal of 216181842364530 is 35463248181612.

216181842364530 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 8 + 1 + 8 + 42 + 3 + 64 + 530 = 666.

216181842364530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 196043710436721 + 20138131927809 = 14001561^2 + 4487553^2 .

It is a super-2 number, since 2×216181842364530² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 27067357 + ... + 34132176.

Almost surely, 2^{216181842364530} is an apocalyptic number.

216181842364530 is an abundant number, since it is smaller than the sum of its proper divisors (467609118952230).

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

216181842364530 is a wasteful number, since it uses less digits than its factorization.

216181842364530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61199655 (or 61199639 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 216181842364530 in words is "two hundred sixteen trillion, one hundred eighty-one billion, eight hundred forty-two million, three hundred sixty-four thousand, five hundred thirty".