641644022 has 32 divisors (see below), whose sum is σ = 1097712000. Its totient is φ = 279393408.

The previous prime is 641644013. The next prime is 641644043. The reversal of 641644022 is 220446146.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 16229 + ... + 39327.

It is an arithmetic number, because the mean of its divisors is an integer number (34303500).

Almost surely, 2^641644022 is an apocalyptic number.

641644022 is a deficient number, since it is larger than the sum of its proper divisors (456067978).

641644022 is a wasteful number, since it uses less digits than its factorization.

641644022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23180.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 641644022 is about 25330.6932791031. The cubic root of 641644022 is about 862.5111488302.

It can be divided in two parts, 64164 and 4022, that added together give a palindrome (68186).

The spelling of 641644022 in words is "six hundred forty-one million, six hundred forty-four thousand, twenty-two".