16609716 has 18 divisors (see below), whose sum is σ = 41985762. Its totient is φ = 5536560.

The previous prime is 16609699. The next prime is 16609727. The reversal of 16609716 is 61790661.

It can be written as a sum of positive squares in only one way, i.e., 14062500 + 2547216 = 3750^2 + 1596^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-4 number, since 4×16609716⁴ (a number of 30 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 461381 = 16609716 / (1 + 6 + 6 + 0 + 9 + 7 + 1 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230655 + ... + 230726.

Almost surely, 2^16609716 is an apocalyptic number.

It is an amenable number.

16609716 is an abundant number, since it is smaller than the sum of its proper divisors (25376046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16609716 is a wasteful number, since it uses less digits than its factorization.

16609716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461391 (or 461386 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 16609716 is about 4075.5019322778. The cubic root of 16609716 is about 255.1451998895.

The spelling of 16609716 in words is "sixteen million, six hundred nine thousand, seven hundred sixteen".