16156609 has 8 divisors (see below), whose sum is σ = 18561920. Its totient is φ = 13775616.

The previous prime is 16156607. The next prime is 16156633. The reversal of 16156609 is 90665161.

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

It is a cyclic number.

It is not a de Polignac number, because 16156609 - 2¹ = 16156607 is a prime.

It is a super-2 number, since 2×16156609² = 522072028757762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16156607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4629 + ... + 7330.

It is an arithmetic number, because the mean of its divisors is an integer number (2320240).

Almost surely, 2^16156609 is an apocalyptic number.

It is an amenable number.

16156609 is a deficient number, since it is larger than the sum of its proper divisors (2405311).

16156609 is a wasteful number, since it uses less digits than its factorization.

16156609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12159.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 16156609 is about 4019.5284549310. The cubic root of 16156609 is about 252.8036877984.

The spelling of 16156609 in words is "sixteen million, one hundred fifty-six thousand, six hundred nine".