6818441808 has 40 divisors (see below), whose sum is σ = 17775920800. Its totient is φ = 2251960704.

The previous prime is 6818441801. The next prime is 6818441837. The reversal of 6818441808 is 8081448186.

It is a happy number.

It is a super-2 number, since 2×6818441808² = 92982297378164617728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6818441801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646378 + ... + 656841.

It is an arithmetic number, because the mean of its divisors is an integer number (444398020).

Almost surely, 2^6818441808 is an apocalyptic number.

It is an amenable number.

6818441808 is an abundant number, since it is smaller than the sum of its proper divisors (10957478992).

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

6818441808 is a wasteful number, since it uses less digits than its factorization.

6818441808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303339 (or 1303333 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 48.

The square root of 6818441808 is about 82573.8566859996. The cubic root of 6818441808 is about 1896.2476087096.

The spelling of 6818441808 in words is "six billion, eight hundred eighteen million, four hundred forty-one thousand, eight hundred eight".