216040168 has 8 divisors (see below), whose sum is σ = 405075330. Its totient is φ = 108020080.

The previous prime is 216040159. The next prime is 216040183. The reversal of 216040168 is 861040612.

It can be written as a sum of positive squares in only one way, i.e., 159820164 + 56220004 = 12642^2 + 7498^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13502503 + ... + 13502518.

Almost surely, 2^216040168 is an apocalyptic number.

It is an amenable number.

216040168 is a deficient number, since it is larger than the sum of its proper divisors (189035162).

216040168 is a wasteful number, since it uses less digits than its factorization.

216040168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27005027 (or 27005023 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 216040168 is about 14698.3049362843. The cubic root of 216040168 is about 600.0371902873.

The spelling of 216040168 in words is "two hundred sixteen million, forty thousand, one hundred sixty-eight".