6808694265889 has 4 divisors (see below), whose sum is σ = 6816639067524. Its totient is φ = 6800749464256.

The previous prime is 6808694265887. The next prime is 6808694265911. The reversal of 6808694265889 is 9885624968086.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4570154635264 + 2238539630625 = 2137792^2 + 1496175^2 .

It is a cyclic number.

It is not a de Polignac number, because 6808694265889 - 2¹ = 6808694265887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6808694265883) 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, 3972399532 + ... + 3972401245.

It is an arithmetic number, because the mean of its divisors is an integer number (1704159766881).

Almost surely, 2^{6808694265889} is an apocalyptic number.

It is an amenable number.

6808694265889 is a deficient number, since it is larger than the sum of its proper divisors (7944801635).

6808694265889 is an equidigital number, since it uses as much as digits as its factorization.

6808694265889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7944801634.

The product of its (nonzero) digits is 2866544640, while the sum is 79.

The spelling of 6808694265889 in words is "six trillion, eight hundred eight billion, six hundred ninety-four million, two hundred sixty-five thousand, eight hundred eighty-nine".