16128609 has 8 divisors (see below), whose sum is σ = 24576960. Its totient is φ = 9216336.

The previous prime is 16128601. The next prime is 16128647. The reversal of 16128609 is 90682161.

16128609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16128609 - 2³ = 16128601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16128609.

It is not an unprimeable number, because it can be changed into a prime (16128601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383994 + ... + 384035.

It is an arithmetic number, because the mean of its divisors is an integer number (3072120).

Almost surely, 2^16128609 is an apocalyptic number.

It is an amenable number.

16128609 is a deficient number, since it is larger than the sum of its proper divisors (8448351).

16128609 is an equidigital number, since it uses as much as digits as its factorization.

16128609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768039.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 16128609 is about 4016.0439489627. The cubic root of 16128609 is about 252.6575639778.

The spelling of 16128609 in words is "sixteen million, one hundred twenty-eight thousand, six hundred nine".