3221664456 has 32 divisors (see below), whose sum is σ = 8055590400. Its totient is φ = 1073697600.

The previous prime is 3221664451. The next prime is 3221664473. The reversal of 3221664456 is 6544661223.

It is not an unprimeable number, because it can be changed into a prime (3221664451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212290 + ... + 226958.

It is an arithmetic number, because the mean of its divisors is an integer number (251737200).

Almost surely, 2^3221664456 is an apocalyptic number.

It is an amenable number.

3221664456 is an abundant number, since it is smaller than the sum of its proper divisors (4833925944).

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

3221664456 is a wasteful number, since it uses less digits than its factorization.

3221664456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23829 (or 23825 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The square root of 3221664456 is about 56759.7080330757. The cubic root of 3221664456 is about 1476.9306452320.

The spelling of 3221664456 in words is "three billion, two hundred twenty-one million, six hundred sixty-four thousand, four hundred fifty-six".