6815327249 has 4 divisors (see below), whose sum is σ = 6816666864. Its totient is φ = 6813987636.

The previous prime is 6815327203. The next prime is 6815327263. The reversal of 6815327249 is 9427235186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6815327249 - 2²⁰ = 6814278673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6815027249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662147 + ... + 672360.

It is an arithmetic number, because the mean of its divisors is an integer number (1704166716).

Almost surely, 2^6815327249 is an apocalyptic number.

It is an amenable number.

6815327249 is a deficient number, since it is larger than the sum of its proper divisors (1339615).

6815327249 is a wasteful number, since it uses less digits than its factorization.

6815327249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339614.

The product of its digits is 725760, while the sum is 47.

The square root of 6815327249 is about 82554.9953001028. The cubic root of 6815327249 is about 1895.9588391880.

The spelling of 6815327249 in words is "six billion, eight hundred fifteen million, three hundred twenty-seven thousand, two hundred forty-nine".