6840646886 has 16 divisors (see below), whose sum is σ = 10525788000. Its totient is φ = 3332281920.

The previous prime is 6840646831. The next prime is 6840646903. The reversal of 6840646886 is 6886460486.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2240 + ... + 116988.

It is an arithmetic number, because the mean of its divisors is an integer number (657861750).

Almost surely, 2^6840646886 is an apocalyptic number.

6840646886 is a deficient number, since it is larger than the sum of its proper divisors (3685141114).

6840646886 is a wasteful number, since it uses less digits than its factorization.

6840646886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115519.

The product of its (nonzero) digits is 10616832, while the sum is 56.

The square root of 6840646886 is about 82708.2032569926. The cubic root of 6840646886 is about 1898.3038312138.

The spelling of 6840646886 in words is "six billion, eight hundred forty million, six hundred forty-six thousand, eight hundred eighty-six".