8344865509 has 4 divisors (see below), whose sum is σ = 8346255660. Its totient is φ = 8343475360.

The previous prime is 8344865489. The next prime is 8344865513. The reversal of 8344865509 is 9055684438.

8344865509 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9055684438 = 2 ⋅4527842219.

It can be written as a sum of positive squares in 2 ways, for example, as 7755444225 + 589421284 = 88065^2 + 24278^2 .

It is a cyclic number.

It is not a de Polignac number, because 8344865509 - 2⁷ = 8344865381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8344865909) 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, 686032 + ... + 698089.

It is an arithmetic number, because the mean of its divisors is an integer number (2086563915).

Almost surely, 2^8344865509 is an apocalyptic number.

It is an amenable number.

8344865509 is a deficient number, since it is larger than the sum of its proper divisors (1390151).

8344865509 is a wasteful number, since it uses less digits than its factorization.

8344865509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390150.

The product of its (nonzero) digits is 4147200, while the sum is 52.

The square root of 8344865509 is about 91350.2354074690. The cubic root of 8344865509 is about 2028.3354477453.

The spelling of 8344865509 in words is "eight billion, three hundred forty-four million, eight hundred sixty-five thousand, five hundred nine".