640224044822 has 8 divisors (see below), whose sum is σ = 960457976400. Its totient is φ = 320071386024.

The previous prime is 640224044773. The next prime is 640224044857. The reversal of 640224044822 is 228440422046.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 20298497 + ... + 20330012.

It is an arithmetic number, because the mean of its divisors is an integer number (120057247050).

Almost surely, 2^640224044822 is an apocalyptic number.

640224044822 is a deficient number, since it is larger than the sum of its proper divisors (320233931578).

640224044822 is a wasteful number, since it uses less digits than its factorization.

640224044822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40636390.

The product of its (nonzero) digits is 196608, while the sum is 38.

Adding to 640224044822 its reverse (228440422046), we get a palindrome (868664466868).

The spelling of 640224044822 in words is "six hundred forty billion, two hundred twenty-four million, forty-four thousand, eight hundred twenty-two".