636221439060 has 48 divisors (see below), whose sum is σ = 1822848409536. Its totient is φ = 165713490432.

The previous prime is 636221438989. The next prime is 636221439071. The reversal of 636221439060 is 60934122636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123296149 + ... + 123301308.

It is an arithmetic number, because the mean of its divisors is an integer number (37976008532).

Almost surely, 2^636221439060 is an apocalyptic number.

636221439060 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

636221439060 is an abundant number, since it is smaller than the sum of its proper divisors (1186626970476).

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

636221439060 is a wasteful number, since it uses less digits than its factorization.

636221439060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246597512 (or 246597510 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 42.

The spelling of 636221439060 in words is "six hundred thirty-six billion, two hundred twenty-one million, four hundred thirty-nine thousand, sixty".