16865941789 has 8 divisors (see below), whose sum is σ = 17241532632. Its totient is φ = 16493547840.

The previous prime is 16865941783. The next prime is 16865941811. The reversal of 16865941789 is 98714956861.

It can be written as a sum of positive squares in 4 ways, for example, as 504100 + 16865437689 = 710^2 + 129867^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 16865941789 - 2²⁵ = 16832387357 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 16865941789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16865941783) 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, 788554 + ... + 809659.

It is an arithmetic number, because the mean of its divisors is an integer number (2155191579).

Almost surely, 2^16865941789 is an apocalyptic number.

It is an amenable number.

16865941789 is a deficient number, since it is larger than the sum of its proper divisors (375590843).

16865941789 is a wasteful number, since it uses less digits than its factorization.

16865941789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598447.

The product of its digits is 26127360, while the sum is 64.

The spelling of 16865941789 in words is "sixteen billion, eight hundred sixty-five million, nine hundred forty-one thousand, seven hundred eighty-nine".