6313813813 has 4 divisors (see below), whose sum is σ = 6322111308. Its totient is φ = 6305516320.

The previous prime is 6313813811. The next prime is 6313813817. The reversal of 6313813813 is 3183183136.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1186251364 + 5127562449 = 34442^2 + 71607^2 .

It is a cyclic number.

It is not a de Polignac number, because 6313813813 - 2¹ = 6313813811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6313813811) 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, 4147606 + ... + 4149127.

It is an arithmetic number, because the mean of its divisors is an integer number (1580527827).

Almost surely, 2^6313813813 is an apocalyptic number.

It is an amenable number.

6313813813 is a deficient number, since it is larger than the sum of its proper divisors (8297495).

6313813813 is an equidigital number, since it uses as much as digits as its factorization.

6313813813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8297494.

The product of its digits is 31104, while the sum is 37.

The square root of 6313813813 is about 79459.5105258018. The cubic root of 6313813813 is about 1848.2636557671.

Adding to 6313813813 its reverse (3183183136), we get a palindrome (9496996949).

The spelling of 6313813813 in words is "six billion, three hundred thirteen million, eight hundred thirteen thousand, eight hundred thirteen".