6246405621 has 24 divisors (see below), whose sum is σ = 9244595360. Its totient is φ = 4062060576.

The previous prime is 6246405569. The next prime is 6246405623. The reversal of 6246405621 is 1265046426.

6246405621 is a `hidden beast` number, since 6 + 2 + 4 + 640 + 5 + 6 + 2 + 1 = 666.

6246405621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6246405621 - 2¹⁰ = 6246404597 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 (6246405623) 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 23 ways as a sum of consecutive naturals, for example, 294315 + ... + 314823.

Almost surely, 2^6246405621 is an apocalyptic number.

It is an amenable number.

6246405621 is a deficient number, since it is larger than the sum of its proper divisors (2998189739).

6246405621 is a wasteful number, since it uses less digits than its factorization.

6246405621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21345 (or 21342 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 6246405621 is about 79034.2053860226. The cubic root of 6246405621 is about 1841.6625667943.

The spelling of 6246405621 in words is "six billion, two hundred forty-six million, four hundred five thousand, six hundred twenty-one".