640224063338 has 8 divisors (see below), whose sum is σ = 960350061060. Its totient is φ = 320107376320.

The previous prime is 640224063299. The next prime is 640224063341. The reversal of 640224063338 is 833360422046.

It is a happy number.

640224063338 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 493636923649 + 146587139689 = 702593^2 + 382867^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 640224063295 and 640224063304.

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, 2153153 + ... + 2432388.

Almost surely, 2^640224063338 is an apocalyptic number.

640224063338 is a deficient number, since it is larger than the sum of its proper divisors (320125997722).

640224063338 is a wasteful number, since it uses less digits than its factorization.

640224063338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4655352.

The product of its (nonzero) digits is 497664, while the sum is 41.

The spelling of 640224063338 in words is "six hundred forty billion, two hundred twenty-four million, sixty-three thousand, three hundred thirty-eight".