6861881686 has 48 divisors (see below), whose sum is σ = 11826857952. Its totient is φ = 2978032640.

The previous prime is 6861881669. The next prime is 6861881693.

6861881686 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6861881686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5637750 + ... + 5638966.

It is an arithmetic number, because the mean of its divisors is an integer number (246392874).

Almost surely, 2^6861881686 is an apocalyptic number.

6861881686 is a deficient number, since it is larger than the sum of its proper divisors (4964976266).

6861881686 is a wasteful number, since it uses less digits than its factorization.

6861881686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277 (or 2266 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 58.

The square root of 6861881686 is about 82836.4755768858. The cubic root of 6861881686 is about 1900.2660464018.

The spelling of 6861881686 in words is "six billion, eight hundred sixty-one million, eight hundred eighty-one thousand, six hundred eighty-six".