216535590873 has 16 divisors (see below), whose sum is σ = 366621106560. Its totient is φ = 123734623248.

The previous prime is 216535590833. The next prime is 216535590881. The reversal of 216535590873 is 378095535612.

216535590873 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 3 + 559 + 0 + 87 + 3 = 666.

It is not a de Polignac number, because 216535590873 - 2¹⁸ = 216535328729 is a prime.

It is a super-2 number, since 2×216535590873² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216535590833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 572845290 + ... + 572845667.

It is an arithmetic number, because the mean of its divisors is an integer number (22913819160).

Almost surely, 2^216535590873 is an apocalyptic number.

It is an amenable number.

216535590873 is a deficient number, since it is larger than the sum of its proper divisors (150085515687).

216535590873 is a wasteful number, since it uses less digits than its factorization.

216535590873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145690973 (or 1145690967 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 54.

The spelling of 216535590873 in words is "two hundred sixteen billion, five hundred thirty-five million, five hundred ninety thousand, eight hundred seventy-three".