6424311621 has 16 divisors (see below), whose sum is σ = 10542460544. Its totient is φ = 3388647744.

The previous prime is 6424311613. The next prime is 6424311659. The reversal of 6424311621 is 1261134246.

It is not a de Polignac number, because 6424311621 - 2³ = 6424311613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6424311601) 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, 11765866 + ... + 11766411.

It is an arithmetic number, because the mean of its divisors is an integer number (658903784).

Almost surely, 2^6424311621 is an apocalyptic number.

It is an amenable number.

6424311621 is a deficient number, since it is larger than the sum of its proper divisors (4118148923).

6424311621 is a wasteful number, since it uses less digits than its factorization.

6424311621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23532300.

The product of its digits is 6912, while the sum is 30.

The square root of 6424311621 is about 80151.8036041610. The cubic root of 6424311621 is about 1858.9834909902.

Adding to 6424311621 its reverse (1261134246), we get a palindrome (7685445867).

The spelling of 6424311621 in words is "six billion, four hundred twenty-four million, three hundred eleven thousand, six hundred twenty-one".