216996853185 has 24 divisors (see below), whose sum is σ = 429860433600. Its totient is φ = 99198561312.

The previous prime is 216996853163. The next prime is 216996853187. The reversal of 216996853185 is 581358699612.

216996853185 is a `hidden beast` number, since 2 + 1 + 6 + 9 + 96 + 8 + 531 + 8 + 5 = 666.

It is not a de Polignac number, because 216996853185 - 2¹⁰ = 216996852161 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216996853187) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 344439135 + ... + 344439764.

It is an arithmetic number, because the mean of its divisors is an integer number (17910851400).

Almost surely, 2^216996853185 is an apocalyptic number.

It is an amenable number.

216996853185 is a deficient number, since it is larger than the sum of its proper divisors (212863580415).

216996853185 is a wasteful number, since it uses less digits than its factorization.

216996853185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688878917 (or 688878914 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 63.

It can be divided in two parts, 21699 and 6853185, that added together give a square (6874884 = 2622²).

The spelling of 216996853185 in words is "two hundred sixteen billion, nine hundred ninety-six million, eight hundred fifty-three thousand, one hundred eighty-five".