16685072289 has 6 divisors (see below), whose sum is σ = 24100659986. Its totient is φ = 11123381520.

The previous prime is 16685072269. The next prime is 16685072311. The reversal of 16685072289 is 98227058661.

It can be written as a sum of positive squares in only one way, i.e., 15548843025 + 1136229264 = 124695^2 + 33708^2 .

It is not a de Polignac number, because 16685072289 - 2¹⁶ = 16685006753 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16685072269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 926948452 + ... + 926948469.

Almost surely, 2^16685072289 is an apocalyptic number.

It is an amenable number.

16685072289 is a deficient number, since it is larger than the sum of its proper divisors (7415587697).

16685072289 is a wasteful number, since it uses less digits than its factorization.

16685072289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853896927 (or 1853896924 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 16685072289 in words is "sixteen billion, six hundred eighty-five million, seventy-two thousand, two hundred eighty-nine".