17889500689 has 4 divisors (see below), whose sum is σ = 18020081124. Its totient is φ = 17758920256.

The previous prime is 17889500659. The next prime is 17889500693. The reversal of 17889500689 is 98600598871.

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 9993401089 + 7896099600 = 99967^2 + 88860^2 .

It is a cyclic number.

It is not a de Polignac number, because 17889500689 - 2²⁵ = 17855946257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17889500659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65290012 + ... + 65290285.

It is an arithmetic number, because the mean of its divisors is an integer number (4505020281).

Almost surely, 2^17889500689 is an apocalyptic number.

It is an amenable number.

17889500689 is a deficient number, since it is larger than the sum of its proper divisors (130580435).

17889500689 is a wasteful number, since it uses less digits than its factorization.

17889500689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130580434.

The product of its (nonzero) digits is 8709120, while the sum is 61.

The spelling of 17889500689 in words is "seventeen billion, eight hundred eighty-nine million, five hundred thousand, six hundred eighty-nine".