16617445 has 8 divisors (see below), whose sum is σ = 21474936. Its totient is φ = 12271296.

The previous prime is 16617443. The next prime is 16617451. The reversal of 16617445 is 54471661.

It can be written as a sum of positive squares in 4 ways, for example, as 1046529 + 15570916 = 1023^2 + 3946^2 .

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 16617445 - 2¹ = 16617443 is a prime.

It is a super-3 number, since 3×16617445³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16617445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16617443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127762 + ... + 127891.

It is an arithmetic number, because the mean of its divisors is an integer number (2684367).

Almost surely, 2^16617445 is an apocalyptic number.

It is an amenable number.

16617445 is a deficient number, since it is larger than the sum of its proper divisors (4857491).

16617445 is a wasteful number, since it uses less digits than its factorization.

16617445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255671.

The product of its digits is 20160, while the sum is 34.

The square root of 16617445 is about 4076.4500487557. The cubic root of 16617445 is about 255.1847693288.

The spelling of 16617445 in words is "sixteen million, six hundred seventeen thousand, four hundred forty-five".