4221744646 has 48 divisors (see below), whose sum is σ = 7514629200. Its totient is φ = 1773135168.

The previous prime is 4221744613. The next prime is 4221744649. The reversal of 4221744646 is 6464471224.

It is a junction number, because it is equal to n+sod(n) for n = 4221744599 and 4221744608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221744649) 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, 2248260 + ... + 2250136.

It is an arithmetic number, because the mean of its divisors is an integer number (156554775).

Almost surely, 2^4221744646 is an apocalyptic number.

4221744646 is a deficient number, since it is larger than the sum of its proper divisors (3292884554).

4221744646 is a wasteful number, since it uses less digits than its factorization.

4221744646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341 (or 2334 counting only the distinct ones).

The product of its digits is 258048, while the sum is 40.

The square root of 4221744646 is about 64974.9539899799. The cubic root of 4221744646 is about 1616.2082541609.

The spelling of 4221744646 in words is "four billion, two hundred twenty-one million, seven hundred forty-four thousand, six hundred forty-six".