16855435189 has 4 divisors (see below), whose sum is σ = 16883204224. Its totient is φ = 16827666156.

The previous prime is 16855435171. The next prime is 16855435199. The reversal of 16855435189 is 98153455861.

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 a cyclic number.

It is not a de Polignac number, because 16855435189 - 2¹¹ = 16855433141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16855435199) 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, 13883607 + ... + 13884820.

It is an arithmetic number, because the mean of its divisors is an integer number (4220801056).

Almost surely, 2^16855435189 is an apocalyptic number.

It is an amenable number.

16855435189 is a deficient number, since it is larger than the sum of its proper divisors (27769035).

16855435189 is an equidigital number, since it uses as much as digits as its factorization.

16855435189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27769034.

The product of its digits is 5184000, while the sum is 55.

The spelling of 16855435189 in words is "sixteen billion, eight hundred fifty-five million, four hundred thirty-five thousand, one hundred eighty-nine".