16764445 has 4 divisors (see below), whose sum is σ = 20117340. Its totient is φ = 13411552.

The previous prime is 16764421. The next prime is 16764457. The reversal of 16764445 is 54446761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10903204 + 5861241 = 3302^2 + 2421^2 .

It is a cyclic number.

It is not a de Polignac number, because 16764445 - 2⁹ = 16763933 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 1676440 + ... + 1676449.

It is an arithmetic number, because the mean of its divisors is an integer number (5029335).

Almost surely, 2^16764445 is an apocalyptic number.

It is an amenable number.

16764445 is a deficient number, since it is larger than the sum of its proper divisors (3352895).

16764445 is an equidigital number, since it uses as much as digits as its factorization.

16764445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3352894.

The product of its digits is 80640, while the sum is 37.

The square root of 16764445 is about 4094.4407432518. The cubic root of 16764445 is about 255.9350268461.

The spelling of 16764445 in words is "sixteen million, seven hundred sixty-four thousand, four hundred forty-five".