6806563899 has 4 divisors (see below), whose sum is σ = 9075418536. Its totient is φ = 4537709264.

The previous prime is 6806563891. The next prime is 6806563931. The reversal of 6806563899 is 9983656086.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6806563899 - 2³ = 6806563891 is a prime.

It is a super-2 number, since 2×6806563899² = 92658624222340164402, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6806563891) 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, 1134427314 + ... + 1134427319.

It is an arithmetic number, because the mean of its divisors is an integer number (2268854634).

Almost surely, 2^6806563899 is an apocalyptic number.

6806563899 is a deficient number, since it is larger than the sum of its proper divisors (2268854637).

6806563899 is a wasteful number, since it uses less digits than its factorization.

6806563899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2268854636.

The product of its (nonzero) digits is 16796160, while the sum is 60.

The square root of 6806563899 is about 82501.9023962478. The cubic root of 6806563899 is about 1895.1458639285.

The spelling of 6806563899 in words is "six billion, eight hundred six million, five hundred sixty-three thousand, eight hundred ninety-nine".