6221705844 has 24 divisors (see below), whose sum is σ = 14909674528. Its totient is φ = 2017850400.

The previous prime is 6221705839. The next prime is 6221705869. The reversal of 6221705844 is 4485071226.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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, 7005982 + ... + 7006869.

Almost surely, 2^6221705844 is an apocalyptic number.

It is an amenable number.

6221705844 is an abundant number, since it is smaller than the sum of its proper divisors (8687968684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6221705844 is a wasteful number, since it uses less digits than its factorization.

6221705844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14012895 (or 14012893 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 6221705844 is about 78877.7905623630. The cubic root of 6221705844 is about 1839.2319025479.

The spelling of 6221705844 in words is "six billion, two hundred twenty-one million, seven hundred five thousand, eight hundred forty-four".