6918021816 has 64 divisors (see below), whose sum is σ = 17512999200. Its totient is φ = 2277101568.

The previous prime is 6918021797. The next prime is 6918021821. The reversal of 6918021816 is 6181208196.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 746620 + ... + 755828.

Almost surely, 2^6918021816 is an apocalyptic number.

It is an amenable number.

6918021816 is an abundant number, since it is smaller than the sum of its proper divisors (10594977384).

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

6918021816 is a wasteful number, since it uses less digits than its factorization.

6918021816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9608 (or 9604 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 6918021816 is about 83174.6464735499. The cubic root of 6918021816 is about 1905.4342868071.

The spelling of 6918021816 in words is "six billion, nine hundred eighteen million, twenty-one thousand, eight hundred sixteen".