216535590833 has 2 divisors, whose sum is σ = 216535590834. Its totient is φ = 216535590832.

The previous prime is 216535590797. The next prime is 216535590881. The reversal of 216535590833 is 338095535612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213229685824 + 3305905009 = 461768^2 + 57497^2 .

It is a cyclic number.

It is not a de Polignac number, because 216535590833 - 2¹⁸ = 216535328689 is a prime.

It is not a weakly prime, because it can be changed into another prime (216535590233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108267795416 + 108267795417.

It is an arithmetic number, because the mean of its divisors is an integer number (108267795417).

Almost surely, 2^216535590833 is an apocalyptic number.

It is an amenable number.

216535590833 is a deficient number, since it is larger than the sum of its proper divisors (1).

216535590833 is an equidigital number, since it uses as much as digits as its factorization.

216535590833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916000, while the sum is 50.

The spelling of 216535590833 in words is "two hundred sixteen billion, five hundred thirty-five million, five hundred ninety thousand, eight hundred thirty-three".