8409061817 has 16 divisors (see below), whose sum is σ = 9327502800. Its totient is φ = 7530630912.

The previous prime is 8409061813. The next prime is 8409061873. The reversal of 8409061817 is 7181609048.

8409061817 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 165148201 + 8243913616 = 12851^2 + 90796^2 .

It is a cyclic number.

It is not a de Polignac number, because 8409061817 - 2² = 8409061813 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8409061813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142823 + ... + 192915.

It is an arithmetic number, because the mean of its divisors is an integer number (582968925).

Almost surely, 2^8409061817 is an apocalyptic number.

It is an amenable number.

8409061817 is a deficient number, since it is larger than the sum of its proper divisors (918440983).

8409061817 is a wasteful number, since it uses less digits than its factorization.

8409061817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50492.

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 8409061817 is about 91700.9368381807. The cubic root of 8409061817 is about 2033.5234348795.

The spelling of 8409061817 in words is "eight billion, four hundred nine million, sixty-one thousand, eight hundred seventeen".