216532664116 has 12 divisors (see below), whose sum is σ = 378957053860. Its totient is φ = 108259220160.

The previous prime is 216532664087. The next prime is 216532664207. The reversal of 216532664116 is 611466235612.

It can be written as a sum of positive squares in 2 ways, for example, as 190230311716 + 26302352400 = 436154^2 + 162180^2 .

It is a super-2 number, since 2×216532664116² (a number of 23 digits) contains 22 as substring.

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, 1709175 + ... + 1831486.

Almost surely, 2^216532664116 is an apocalyptic number.

It is an amenable number.

216532664116 is a deficient number, since it is larger than the sum of its proper divisors (162424389744).

216532664116 is a wasteful number, since it uses less digits than its factorization.

216532664116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3555954 (or 3555952 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

Adding to 216532664116 its reverse (611466235612), we get a palindrome (827998899728).

The spelling of 216532664116 in words is "two hundred sixteen billion, five hundred thirty-two million, six hundred sixty-four thousand, one hundred sixteen".