216166517185 has 16 divisors (see below), whose sum is σ = 274194950400. Its totient is φ = 163145961216.

The previous prime is 216166517173. The next prime is 216166517197. The reversal of 216166517185 is 581715661612.

It is an interprime number because it is at equal distance from previous prime (216166517173) and next prime (216166517197).

It is a cyclic number.

It is not a de Polignac number, because 216166517185 - 2⁷ = 216166517057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4737624 + ... + 4783033.

It is an arithmetic number, because the mean of its divisors is an integer number (17137184400).

Almost surely, 2^216166517185 is an apocalyptic number.

It is an amenable number.

216166517185 is a deficient number, since it is larger than the sum of its proper divisors (58028433215).

216166517185 is a wasteful number, since it uses less digits than its factorization.

216166517185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9520920.

The product of its digits is 604800, while the sum is 49.

The spelling of 216166517185 in words is "two hundred sixteen billion, one hundred sixty-six million, five hundred seventeen thousand, one hundred eighty-five".