6816587808 has 96 divisors (see below), whose sum is σ = 18547704000. Its totient is φ = 2189444096.

The previous prime is 6816587807. The next prime is 6816587821. The reversal of 6816587808 is 8087856186.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (6816587803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1565218 + ... + 1569566.

It is an arithmetic number, because the mean of its divisors is an integer number (193205250).

Almost surely, 2^6816587808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6816587808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9273852000).

6816587808 is an abundant number, since it is smaller than the sum of its proper divisors (11731116192).

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

6816587808 is a wasteful number, since it uses less digits than its factorization.

6816587808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4954 (or 4946 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 57.

The square root of 6816587808 is about 82562.6296092851. The cubic root of 6816587808 is about 1896.0757238001.

The spelling of 6816587808 in words is "six billion, eight hundred sixteen million, five hundred eighty-seven thousand, eight hundred eight".