6421611313 has 16 divisors (see below), whose sum is σ = 7064438976. Its totient is φ = 5801388480.

The previous prime is 6421611311. The next prime is 6421611341. The reversal of 6421611313 is 3131161246.

It is a cyclic number.

It is not a de Polignac number, because 6421611313 - 2¹ = 6421611311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6421611311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87643 + ... + 143263.

It is an arithmetic number, because the mean of its divisors is an integer number (441527436).

Almost surely, 2^6421611313 is an apocalyptic number.

It is an amenable number.

6421611313 is a deficient number, since it is larger than the sum of its proper divisors (642827663).

6421611313 is a wasteful number, since it uses less digits than its factorization.

6421611313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55824.

The product of its digits is 2592, while the sum is 28.

The square root of 6421611313 is about 80134.9568727656. The cubic root of 6421611313 is about 1858.7229945212.

Adding to 6421611313 its reverse (3131161246), we get a palindrome (9552772559).

The spelling of 6421611313 in words is "six billion, four hundred twenty-one million, six hundred eleven thousand, three hundred thirteen".