16768645 has 4 divisors (see below), whose sum is σ = 20122380. Its totient is φ = 13414912.

The previous prime is 16768643. The next prime is 16768651. The reversal of 16768645 is 54686761.

It is a happy number.

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 12236004 + 4532641 = 3498^2 + 2129^2 .

It is a cyclic number.

It is not a de Polignac number, because 16768645 - 2¹ = 16768643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16768643) 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 3 ways as a sum of consecutive naturals, for example, 1676860 + ... + 1676869.

It is an arithmetic number, because the mean of its divisors is an integer number (5030595).

Almost surely, 2^16768645 is an apocalyptic number.

It is an amenable number.

16768645 is a deficient number, since it is larger than the sum of its proper divisors (3353735).

16768645 is an equidigital number, since it uses as much as digits as its factorization.

16768645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3353734.

The product of its digits is 241920, while the sum is 43.

The square root of 16768645 is about 4094.9536016907. The cubic root of 16768645 is about 255.9563982138.

It can be divided in two parts, 16 and 768645, that multiplied together give a triangular number (12298320 = T₄₉₅₉).

The spelling of 16768645 in words is "sixteen million, seven hundred sixty-eight thousand, six hundred forty-five".