16389996589 has 8 divisors (see below), whose sum is σ = 16630057080. Its totient is φ = 16151387136.

The previous prime is 16389996551. The next prime is 16389996647. The reversal of 16389996589 is 98569998361.

It can be written as a sum of positive squares in 4 ways, for example, as 373069225 + 16016927364 = 19315^2 + 126558^2 .

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 16389996589 - 2¹¹ = 16389994541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16389996529) 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, 339994 + ... + 385195.

It is an arithmetic number, because the mean of its divisors is an integer number (2078757135).

Almost surely, 2^16389996589 is an apocalyptic number.

It is an amenable number.

16389996589 is a deficient number, since it is larger than the sum of its proper divisors (240060491).

16389996589 is an equidigital number, since it uses as much as digits as its factorization.

16389996589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725519.

The product of its digits is 226748160, while the sum is 73.

The spelling of 16389996589 in words is "sixteen billion, three hundred eighty-nine million, nine hundred ninety-six thousand, five hundred eighty-nine".