216402444116 has 12 divisors (see below), whose sum is σ = 382178629140. Its totient is φ = 107208550080.

The previous prime is 216402444107. The next prime is 216402444133. The reversal of 216402444116 is 611444204612.

It can be written as a sum of positive squares in 2 ways, for example, as 91089276100 + 125313168016 = 301810^2 + 353996^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248167505 + ... + 248168376.

It is an arithmetic number, because the mean of its divisors is an integer number (31848219095).

Almost surely, 2^216402444116 is an apocalyptic number.

It is an amenable number.

216402444116 is a deficient number, since it is larger than the sum of its proper divisors (165776185024).

216402444116 is a wasteful number, since it uses less digits than its factorization.

216402444116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496335994 (or 496335992 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

Adding to 216402444116 its reverse (611444204612), we get a palindrome (827846648728).

The spelling of 216402444116 in words is "two hundred sixteen billion, four hundred two million, four hundred forty-four thousand, one hundred sixteen".