12016889617 has 4 divisors (see below), whose sum is σ = 12017180196. Its totient is φ = 12016599040.

The previous prime is 12016889611. The next prime is 12016889623. The reversal of 12016889617 is 71698861021.

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

It is an interprime number because it is at equal distance from previous prime (12016889611) and next prime (12016889623).

It can be written as a sum of positive squares in 2 ways, for example, as 1464669441 + 10552220176 = 38271^2 + 102724^2 .

It is a cyclic number.

It is not a de Polignac number, because 12016889617 - 2³ = 12016889609 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12016889611) 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, 70384 + ... + 170257.

It is an arithmetic number, because the mean of its divisors is an integer number (3004295049).

Almost surely, 2^12016889617 is an apocalyptic number.

It is an amenable number.

12016889617 is a deficient number, since it is larger than the sum of its proper divisors (290579).

12016889617 is an equidigital number, since it uses as much as digits as its factorization.

12016889617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290578.

The product of its (nonzero) digits is 290304, while the sum is 49.

The spelling of 12016889617 in words is "twelve billion, sixteen million, eight hundred eighty-nine thousand, six hundred seventeen".