216144322146 has 24 divisors (see below), whose sum is σ = 469243756800. Its totient is φ = 71904867576.

The previous prime is 216144322139. The next prime is 216144322189. The reversal of 216144322146 is 641223441612.

216144322146 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 4 + 432 + 214 + 6 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 216144322146.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11927346 + ... + 11945453.

It is an arithmetic number, because the mean of its divisors is an integer number (19551823200).

Almost surely, 2^216144322146 is an apocalyptic number.

216144322146 is an abundant number, since it is smaller than the sum of its proper divisors (253099434654).

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

216144322146 is a wasteful number, since it uses less digits than its factorization.

216144322146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23873310 (or 23873307 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

Adding to 216144322146 its reverse (641223441612), we get a palindrome (857367763758).

The spelling of 216144322146 in words is "two hundred sixteen billion, one hundred forty-four million, three hundred twenty-two thousand, one hundred forty-six".