6864899816 has 16 divisors (see below), whose sum is σ = 12936372000. Its totient is φ = 3415200624.

The previous prime is 6864899813. The next prime is 6864899827. The reversal of 6864899816 is 6189984686.

It is not an unprimeable number, because it can be changed into a prime (6864899813) 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, 2154470 + ... + 2157653.

It is an arithmetic number, because the mean of its divisors is an integer number (808523250).

Almost surely, 2^6864899816 is an apocalyptic number.

It is an amenable number.

6864899816 is a deficient number, since it is larger than the sum of its proper divisors (6071472184).

6864899816 is a wasteful number, since it uses less digits than its factorization.

6864899816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4312328 (or 4312324 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 65.

The square root of 6864899816 is about 82854.6909716040. The cubic root of 6864899816 is about 1900.5446099002.

The spelling of 6864899816 in words is "six billion, eight hundred sixty-four million, eight hundred ninety-nine thousand, eight hundred sixteen".