636039168 has 104 divisors (see below), whose sum is σ = 1711067136. Its totient is φ = 210124800.

The previous prime is 636039163. The next prime is 636039169. The reversal of 636039168 is 861930636.

It is not an unprimeable number, because it can be changed into a prime (636039161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2346873 + ... + 2347143.

Almost surely, 2^636039168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636039168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (855533568).

636039168 is an abundant number, since it is smaller than the sum of its proper divisors (1075027968).

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

636039168 is a wasteful number, since it uses less digits than its factorization.

636039168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 636039168 is about 25219.8169699941. The cubic root of 636039168 is about 859.9924138505.

It can be divided in two parts, 63603 and 9168, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 636039168 in words is "six hundred thirty-six million, thirty-nine thousand, one hundred sixty-eight".