6885555885 has 96 divisors (see below), whose sum is σ = 13775344128. Its totient is φ = 3154567680.

The previous prime is 6885555881. The next prime is 6885555889. The reversal of 6885555885 is 5885555886.

It is an interprime number because it is at equal distance from previous prime (6885555881) and next prime (6885555889).

It is not a de Polignac number, because 6885555885 - 2² = 6885555881 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6885555881) 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 95 ways as a sum of consecutive naturals, for example, 490920 + ... + 504750.

It is an arithmetic number, because the mean of its divisors is an integer number (143493168).

Almost surely, 2^6885555885 is an apocalyptic number.

6885555885 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6885555885 is an abundant number, since it is smaller than the sum of its proper divisors (6889788243).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6885555885 is a wasteful number, since it uses less digits than its factorization.

6885555885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13915 (or 13912 counting only the distinct ones).

The product of its digits is 76800000, while the sum is 63.

The square root of 6885555885 is about 82979.2497254585. The cubic root of 6885555885 is about 1902.4489091896.

Subtracting from 6885555885 its reverse (5885555886), we obtain a palindrome (999999999).

The spelling of 6885555885 in words is "six billion, eight hundred eighty-five million, five hundred fifty-five thousand, eight hundred eighty-five".