216671506011 has 16 divisors (see below), whose sum is σ = 321503557120. Its totient is φ = 144218740680.

The previous prime is 216671505991. The next prime is 216671506057. The reversal of 216671506011 is 110605176612.

It is a happy number.

216671506011 is a `hidden beast` number, since 21 + 66 + 71 + 506 + 0 + 1 + 1 = 666.

216671506011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216671506011 - 2¹¹ = 216671503963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216671506061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6341815 + ... + 6375888.

It is an arithmetic number, because the mean of its divisors is an integer number (20093972320).

Almost surely, 2^216671506011 is an apocalyptic number.

216671506011 is a deficient number, since it is larger than the sum of its proper divisors (104832051109).

216671506011 is a wasteful number, since it uses less digits than its factorization.

216671506011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12718343 (or 12718337 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The spelling of 216671506011 in words is "two hundred sixteen billion, six hundred seventy-one million, five hundred six thousand, eleven".