216869853168 has 80 divisors (see below), whose sum is σ = 622579274400. Its totient is φ = 72280373760.

The previous prime is 216869853149. The next prime is 216869853191. The reversal of 216869853168 is 861358968612.

216869853168 is a `hidden beast` number, since 2 + 1 + 6 + 8 + 6 + 98 + 531 + 6 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3721278 + ... + 3779106.

It is an arithmetic number, because the mean of its divisors is an integer number (7782240930).

Almost surely, 2^216869853168 is an apocalyptic number.

It is an amenable number.

216869853168 is an abundant number, since it is smaller than the sum of its proper divisors (405709421232).

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

216869853168 is a wasteful number, since it uses less digits than its factorization.

216869853168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66527 (or 66515 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The spelling of 216869853168 in words is "two hundred sixteen billion, eight hundred sixty-nine million, eight hundred fifty-three thousand, one hundred sixty-eight".