15993902089 has 9 divisors (see below), whose sum is σ = 17581603431. Its totient is φ = 14538646320.

The previous prime is 15993902069. The next prime is 15993902189. The reversal of 15993902089 is 98020939951.

The square root of 15993902089 is 126467.

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

15993902089 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., 9595182025 + 6398720064 = 97955^2 + 79992^2 .

It is not a de Polignac number, because 15993902089 - 2¹⁵ = 15993869321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15993902009) 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, 1385389 + ... + 1396885.

Almost surely, 2^15993902089 is an apocalyptic number.

15993902089 is the 126467-th square number.

15993902089 is the 63234-th centered octagonal number.

It is an amenable number.

15993902089 is a deficient number, since it is larger than the sum of its proper divisors (1587701342).

15993902089 is an frugal number, since it uses more digits than its factorization.

15993902089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23016 (or 11508 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 55.

The spelling of 15993902089 in words is "fifteen billion, nine hundred ninety-three million, nine hundred two thousand, eighty-nine".