16520732089 has 9 divisors (see below), whose sum is σ = 16742792997. Its totient is φ = 16301583324.

The previous prime is 16520732029. The next prime is 16520732099. The reversal of 16520732089 is 98023702561.

The square root of 16520732089 is 128533.

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

It is not a de Polignac number, because 16520732089 - 2¹³ = 16520723897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16520732029) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10153294 + ... + 10154920.

It is an arithmetic number, because the mean of its divisors is an integer number (1860310333).

Almost surely, 2^16520732089 is an apocalyptic number.

16520732089 is the 128533-rd square number.

16520732089 is the 64267-th centered octagonal number.

It is an amenable number.

16520732089 is a deficient number, since it is larger than the sum of its proper divisors (222060908).

16520732089 is an frugal number, since it uses more digits than its factorization.

16520732089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3412 (or 1706 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 16520732089 in words is "sixteen billion, five hundred twenty million, seven hundred thirty-two thousand, eighty-nine".