6806532891 has 4 divisors (see below), whose sum is σ = 9075377192. Its totient is φ = 4537688592.

The previous prime is 6806532857. The next prime is 6806532979. The reversal of 6806532891 is 1982356086.

It is a happy number.

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

It is not a de Polignac number, because 6806532891 - 2¹⁵ = 6806500123 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 6806532891.

It is not an unprimeable number, because it can be changed into a prime (6806532851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1134422146 + ... + 1134422151.

It is an arithmetic number, because the mean of its divisors is an integer number (2268844298).

Almost surely, 2^6806532891 is an apocalyptic number.

6806532891 is a deficient number, since it is larger than the sum of its proper divisors (2268844301).

6806532891 is a wasteful number, since it uses less digits than its factorization.

6806532891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2268844300.

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 6806532891 is about 82501.7144730944. The cubic root of 6806532891 is about 1895.1429860803.

The spelling of 6806532891 in words is "six billion, eight hundred six million, five hundred thirty-two thousand, eight hundred ninety-one".