16645445 has 16 divisors (see below), whose sum is σ = 21244032. Its totient is φ = 12492480.

The previous prime is 16645427. The next prime is 16645469. The reversal of 16645445 is 54454661.

16645445 = 322² + 323² + ... + 436².

It is not a de Polignac number, because 16645445 - 2²² = 12451141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4730 + ... + 7460.

It is an arithmetic number, because the mean of its divisors is an integer number (1327752).

Almost surely, 2^16645445 is an apocalyptic number.

It is an amenable number.

16645445 is a deficient number, since it is larger than the sum of its proper divisors (4598587).

16645445 is a wasteful number, since it uses less digits than its factorization.

16645445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812.

The product of its digits is 57600, while the sum is 35.

The square root of 16645445 is about 4079.8829640077. The cubic root of 16645445 is about 255.3280156611.

The spelling of 16645445 in words is "sixteen million, six hundred forty-five thousand, four hundred forty-five".