216798341889 has 4 divisors (see below), whose sum is σ = 289064455856. Its totient is φ = 144532227924.

The previous prime is 216798341867. The next prime is 216798341927. The reversal of 216798341889 is 988143897612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 216798341889 - 2⁹ = 216798341377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216798341189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36133056979 + ... + 36133056984.

It is an arithmetic number, because the mean of its divisors is an integer number (72266113964).

Almost surely, 2^216798341889 is an apocalyptic number.

It is an amenable number.

216798341889 is a deficient number, since it is larger than the sum of its proper divisors (72266113967).

216798341889 is an equidigital number, since it uses as much as digits as its factorization.

216798341889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72266113966.

The product of its digits is 41803776, while the sum is 66.

The spelling of 216798341889 in words is "two hundred sixteen billion, seven hundred ninety-eight million, three hundred forty-one thousand, eight hundred eighty-nine".