6888888888889 has 12 divisors (see below), whose sum is σ = 8015078570868. Its totient is φ = 5903676441600.

The previous prime is 6888888888877. The next prime is 6888888888929. The reversal of 6888888888889 is 9888888888886.

It can be written as a sum of positive squares in 2 ways, for example, as 3825016735225 + 3063872153664 = 1955765^2 + 1750392^2 .

It is not a de Polignac number, because 6888888888889 - 2¹⁵ = 6888888856121 is a prime.

6888888888889 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (6888888885889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12652852 + ... + 13186069.

It is an arithmetic number, because the mean of its divisors is an integer number (667923214239).

Almost surely, 2^{6888888888889} is an apocalyptic number.

It is an amenable number.

6888888888889 is a deficient number, since it is larger than the sum of its proper divisors (1126189681979).

6888888888889 is a wasteful number, since it uses less digits than its factorization.

6888888888889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25844376 (or 25844369 counting only the distinct ones).

The product of its digits is 463856467968, while the sum is 103.

It can be divided in two parts, 6888888 and 888889, that added together give a palindrome (7777777).

The spelling of 6888888888889 in words is "six trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-nine".