6365721313 has 8 divisors (see below), whose sum is σ = 7429900032. Its totient is φ = 5340240096.

The previous prime is 6365721301. The next prime is 6365721343. The reversal of 6365721313 is 3131275636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6365721313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6365721343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9674020 + ... + 9674677.

It is an arithmetic number, because the mean of its divisors is an integer number (928737504).

Almost surely, 2^6365721313 is an apocalyptic number.

It is an amenable number.

6365721313 is a deficient number, since it is larger than the sum of its proper divisors (1064178719).

6365721313 is a wasteful number, since it uses less digits than its factorization.

6365721313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19348751.

The product of its digits is 68040, while the sum is 37.

The square root of 6365721313 is about 79785.4705632548. The cubic root of 6365721313 is about 1853.3148567468.

Adding to 6365721313 its reverse (3131275636), we get a palindrome (9496996949).

It can be divided in two parts, 636572 and 1313, that added together give a triangular number (637885 = T₁₁₂₉).

The spelling of 6365721313 in words is "six billion, three hundred sixty-five million, seven hundred twenty-one thousand, three hundred thirteen".