6813955864 has 24 divisors (see below), whose sum is σ = 13483993860. Its totient is φ = 3227661936.

The previous prime is 6813955859. The next prime is 6813955871. The reversal of 6813955864 is 4685593186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1176814 + ... + 1182589.

Almost surely, 2^6813955864 is an apocalyptic number.

It is an amenable number.

6813955864 is a deficient number, since it is larger than the sum of its proper divisors (6670037996).

6813955864 is a wasteful number, since it uses less digits than its factorization.

6813955864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359447 (or 2359424 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 55.

The square root of 6813955864 is about 82546.6889947743. The cubic root of 6813955864 is about 1895.8316619284.

The spelling of 6813955864 in words is "six billion, eight hundred thirteen million, nine hundred fifty-five thousand, eight hundred sixty-four".