636009538938 has 8 divisors (see below), whose sum is σ = 1272019077888. Its totient is φ = 212003179644.

The previous prime is 636009538937. The next prime is 636009538943. The reversal of 636009538938 is 839835900636.

636009538938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

636009538938 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (636009538933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53000794906 + ... + 53000794917.

It is an arithmetic number, because the mean of its divisors is an integer number (159002384736).

Almost surely, 2^636009538938 is an apocalyptic number.

636009538938 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

636009538938 is a wasteful number, since it uses less digits than its factorization.

636009538938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106001589828.

The product of its (nonzero) digits is 25194240, while the sum is 60.

The spelling of 636009538938 in words is "six hundred thirty-six billion, nine million, five hundred thirty-eight thousand, nine hundred thirty-eight".