16689145 has 32 divisors (see below), whose sum is σ = 23224320. Its totient is φ = 11394240.

The previous prime is 16689143. The next prime is 16689157. The reversal of 16689145 is 54198661.

It is not a de Polignac number, because 16689145 - 2¹ = 16689143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16689098 and 16689107.

It is not an unprimeable number, because it can be changed into a prime (16689143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99852 + ... + 100018.

It is an arithmetic number, because the mean of its divisors is an integer number (725760).

Almost surely, 2^16689145 is an apocalyptic number.

It is an amenable number.

16689145 is a deficient number, since it is larger than the sum of its proper divisors (6535175).

16689145 is a wasteful number, since it uses less digits than its factorization.

16689145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285.

The product of its digits is 51840, while the sum is 40.

The square root of 16689145 is about 4085.2349993605. The cubic root of 16689145 is about 255.5512616026.

The spelling of 16689145 in words is "sixteen million, six hundred eighty-nine thousand, one hundred forty-five".