640224444604 has 12 divisors (see below), whose sum is σ = 1123603075000. Its totient is φ = 319194994608.

The previous prime is 640224444589. The next prime is 640224444617. The reversal of 640224444604 is 406444422046.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229305354 + ... + 229308145.

Almost surely, 2^640224444604 is an apocalyptic number.

It is an amenable number.

640224444604 is a deficient number, since it is larger than the sum of its proper divisors (483378630396).

640224444604 is a wasteful number, since it uses less digits than its factorization.

640224444604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458613852 (or 458613850 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 40.

The spelling of 640224444604 in words is "six hundred forty billion, two hundred twenty-four million, four hundred forty-four thousand, six hundred four".