8546447809 has 9 divisors (see below), whose sum is σ = 8608932003. Its totient is φ = 8484415872.

The previous prime is 8546447803. The next prime is 8546447821. The reversal of 8546447809 is 9087446458.

It is a happy number.

The square root of 8546447809 is 92447.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2070705025 + 6475742784 = 45505^2 + 80472^2 .

It is not a de Polignac number, because 8546447809 - 2⁷ = 8546447681 is a prime.

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 8546447809.

It is not an unprimeable number, because it can be changed into a prime (8546447803) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 17842032 + ... + 17842510.

Almost surely, 2^8546447809 is an apocalyptic number.

8546447809 is the 92447-th square number.

8546447809 is the 46224-th centered octagonal number.

It is an amenable number.

8546447809 is a deficient number, since it is larger than the sum of its proper divisors (62484194).

8546447809 is an frugal number, since it uses more digits than its factorization.

8546447809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 55.

The cubic root of 8546447809 is about 2044.5381324733.

The spelling of 8546447809 in words is "eight billion, five hundred forty-six million, four hundred forty-seven thousand, eight hundred nine".