6863319920 has 20 divisors (see below), whose sum is σ = 15957219000. Its totient is φ = 2745327936.

The previous prime is 6863319857. The next prime is 6863319923. The reversal of 6863319920 is 299133686.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6863319923) 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 3 ways as a sum of consecutive naturals, for example, 42895670 + ... + 42895829.

It is an arithmetic number, because the mean of its divisors is an integer number (797860950).

Almost surely, 2^6863319920 is an apocalyptic number.

It is an amenable number.

6863319920 is an abundant number, since it is smaller than the sum of its proper divisors (9093899080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6863319920 is a wasteful number, since it uses less digits than its factorization.

6863319920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85791512 (or 85791506 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 47.

The square root of 6863319920 is about 82845.1562856876. The cubic root of 6863319920 is about 1900.3988008676.

The spelling of 6863319920 in words is "six billion, eight hundred sixty-three million, three hundred nineteen thousand, nine hundred twenty".