16189866289 has 4 divisors (see below), whose sum is σ = 16333139556. Its totient is φ = 16046593024.

The previous prime is 16189866263. The next prime is 16189866299. The reversal of 16189866289 is 98266898161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 207849889 + 15982016400 = 14417^2 + 126420^2 .

It is not a de Polignac number, because 16189866289 - 2⁵ = 16189866257 is a prime.

It is a super-2 number, since 2×16189866289² (a number of 21 digits) contains 22 as substring.

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 16189866289.

It is not an unprimeable number, because it can be changed into a prime (16189866299) 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, 71636464 + ... + 71636689.

It is an arithmetic number, because the mean of its divisors is an integer number (4083284889).

Almost surely, 2^16189866289 is an apocalyptic number.

It is an amenable number.

16189866289 is a deficient number, since it is larger than the sum of its proper divisors (143273267).

16189866289 is a wasteful number, since it uses less digits than its factorization.

16189866289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143273266.

The product of its digits is 17915904, while the sum is 64.

The spelling of 16189866289 in words is "sixteen billion, one hundred eighty-nine million, eight hundred sixty-six thousand, two hundred eighty-nine".