16511112216 has 24 divisors (see below), whose sum is σ = 44717595780. Its totient is φ = 5503704048.

The previous prime is 16511112209. The next prime is 16511112227. The reversal of 16511112216 is 61221111561.

16511112216 is a `hidden beast` number, since 1 + 651 + 1 + 1 + 1 + 2 + 2 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 16511112216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114660430 + ... + 114660573.

Almost surely, 2^16511112216 is an apocalyptic number.

It is an amenable number.

16511112216 is an abundant number, since it is smaller than the sum of its proper divisors (28206483564).

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

16511112216 is a wasteful number, since it uses less digits than its factorization.

16511112216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229321015 (or 229321008 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

Adding to 16511112216 its reverse (61221111561), we get a palindrome (77732223777).

The spelling of 16511112216 in words is "sixteen billion, five hundred eleven million, one hundred twelve thousand, two hundred sixteen".