4491672809 has 16 divisors (see below), whose sum is σ = 4857914880. Its totient is φ = 4128442560.

The previous prime is 4491672803. The next prime is 4491672811. The reversal of 4491672809 is 9082761944.

It is a cyclic number.

It is not a de Polignac number, because 4491672809 - 2⁴ = 4491672793 is a prime.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4491672803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6178004 + ... + 6178730.

It is an arithmetic number, because the mean of its divisors is an integer number (303619680).

Almost surely, 2^4491672809 is an apocalyptic number.

It is an amenable number.

4491672809 is a deficient number, since it is larger than the sum of its proper divisors (366242071).

4491672809 is a wasteful number, since it uses less digits than its factorization.

4491672809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120.

The product of its (nonzero) digits is 870912, while the sum is 50.

The square root of 4491672809 is about 67019.9433676275. The cubic root of 4491672809 is about 1649.9446334651.

The spelling of 4491672809 in words is "four billion, four hundred ninety-one million, six hundred seventy-two thousand, eight hundred nine".