6861806804 has 12 divisors (see below), whose sum is σ = 12118329300. Its totient is φ = 3399427008.

The previous prime is 6861806773. The next prime is 6861806807. The reversal of 6861806804 is 4086081686.

It can be written as a sum of positive squares in 2 ways, for example, as 1954524100 + 4907282704 = 44210^2 + 70052^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6861806807) 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, 7868609 + ... + 7869480.

It is an arithmetic number, because the mean of its divisors is an integer number (1009860775).

Almost surely, 2^6861806804 is an apocalyptic number.

It is an amenable number.

6861806804 is a deficient number, since it is larger than the sum of its proper divisors (5256522496).

6861806804 is a wasteful number, since it uses less digits than its factorization.

6861806804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15738202 (or 15738200 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The square root of 6861806804 is about 82836.0235887745. The cubic root of 6861806804 is about 1900.2591340005.

The spelling of 6861806804 in words is "six billion, eight hundred sixty-one million, eight hundred six thousand, eight hundred four".