6816544794 has 40 divisors (see below), whose sum is σ = 15326346420. Its totient is φ = 2264410944.

The previous prime is 6816544751. The next prime is 6816544807. The reversal of 6816544794 is 4974456186.

6816544794 is a `hidden beast` number, since 6 + 8 + 1 + 6 + 544 + 7 + 94 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6744515625 + 72029169 = 82125^2 + 8487^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 6816544794.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24339 + ... + 119270.

Almost surely, 2^6816544794 is an apocalyptic number.

6816544794 is an abundant number, since it is smaller than the sum of its proper divisors (8509801626).

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

6816544794 is a wasteful number, since it uses less digits than its factorization.

6816544794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143916 (or 143907 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 6816544794 is about 82562.3691157176. The cubic root of 6816544794 is about 1896.0717355890.

The spelling of 6816544794 in words is "six billion, eight hundred sixteen million, five hundred forty-four thousand, seven hundred ninety-four".