16389888529 has 9 divisors (see below), whose sum is σ = 19066831227. Its totient is φ = 14047707744.

The previous prime is 16389888523. The next prime is 16389888563. The reversal of 16389888529 is 92588898361.

The square root of 16389888529 is 128023.

It is a perfect power (a square), and thus also a powerful number.

16389888529 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 16161274129 + 228614400 = 127127^2 + 15120^2 .

It is not a de Polignac number, because 16389888529 - 2¹⁵ = 16389855761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16389888523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 887017 + ... + 905305.

It is an arithmetic number, because the mean of its divisors is an integer number (2118536803).

Almost surely, 2^16389888529 is an apocalyptic number.

16389888529 is the 128023-rd square number.

16389888529 is the 64012-nd centered octagonal number.

It is an amenable number.

16389888529 is a deficient number, since it is larger than the sum of its proper divisors (2676942698).

16389888529 is an frugal number, since it uses more digits than its factorization.

16389888529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36592 (or 18296 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 67.

The spelling of 16389888529 in words is "sixteen billion, three hundred eighty-nine million, eight hundred eighty-eight thousand, five hundred twenty-nine".