16805116889 has 8 divisors (see below), whose sum is σ = 18335658432. Its totient is φ = 15275042640.

The previous prime is 16805116873. The next prime is 16805116891. The reversal of 16805116889 is 98861150861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16805116889 - 2⁴ = 16805116873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16805116889.

It is not an unprimeable number, because it can be changed into a prime (16805116829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39389 + ... + 187514.

It is an arithmetic number, because the mean of its divisors is an integer number (2291957304).

Almost surely, 2^16805116889 is an apocalyptic number.

It is an amenable number.

16805116889 is a deficient number, since it is larger than the sum of its proper divisors (1530541543).

16805116889 is a wasteful number, since it uses less digits than its factorization.

16805116889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233647.

The product of its (nonzero) digits is 829440, while the sum is 53.

The spelling of 16805116889 in words is "sixteen billion, eight hundred five million, one hundred sixteen thousand, eight hundred eighty-nine".