636344434944 has 81 divisors (see below), whose sum is σ = 1834848289183. Its totient is φ = 212102048256.

The previous prime is 636344434937. The next prime is 636344434967. The reversal of 636344434944 is 449434443636.

The square root of 636344434944 is 797712.

It is a perfect power (a square), and thus also a powerful number.

636344434944 is a `hidden beast` number, since 63 + 63 + 4 + 4 + 434 + 94 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 38281867 + ... + 38298485.

Almost surely, 2^636344434944 is an apocalyptic number.

636344434944 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

636344434944 is the 797712-nd square number.

It is an amenable number.

636344434944 is an abundant number, since it is smaller than the sum of its proper divisors (1198503854239).

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

636344434944 is an frugal number, since it uses more digits than its factorization.

636344434944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33260 (or 16624 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 54.

The spelling of 636344434944 in words is "six hundred thirty-six billion, three hundred forty-four million, four hundred thirty-four thousand, nine hundred forty-four".