6378864813 has 24 divisors (see below), whose sum is σ = 9789530400. Its totient is φ = 3991093344.

The previous prime is 6378864773. The next prime is 6378864839. The reversal of 6378864813 is 3184688736.

It is not a de Polignac number, because 6378864813 - 2⁶ = 6378864749 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6378864813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6378864883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156018 + ... + 192611.

It is an arithmetic number, because the mean of its divisors is an integer number (407897100).

Almost surely, 2^6378864813 is an apocalyptic number.

It is an amenable number.

6378864813 is a deficient number, since it is larger than the sum of its proper divisors (3410665587).

6378864813 is a wasteful number, since it uses less digits than its factorization.

6378864813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348761 (or 348758 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 6378864813 is about 79867.7958441323. The cubic root of 6378864813 is about 1854.5895118813.

The spelling of 6378864813 in words is "six billion, three hundred seventy-eight million, eight hundred sixty-four thousand, eight hundred thirteen".