636422549772 has 24 divisors (see below), whose sum is σ = 1487302638192. Its totient is φ = 211809894400.

The previous prime is 636422549747. The next prime is 636422549783. The reversal of 636422549772 is 277945224636.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 41361429 + ... + 41376812.

It is an arithmetic number, because the mean of its divisors is an integer number (61970943258).

Almost surely, 2^636422549772 is an apocalyptic number.

It is an amenable number.

636422549772 is an abundant number, since it is smaller than the sum of its proper divisors (850880088420).

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

636422549772 is a wasteful number, since it uses less digits than its factorization.

636422549772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82738889 (or 82738887 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 57.

The spelling of 636422549772 in words is "six hundred thirty-six billion, four hundred twenty-two million, five hundred forty-nine thousand, seven hundred seventy-two".