636063660 has 144 divisors (see below), whose sum is σ = 1984862880. Its totient is φ = 164812800.

The previous prime is 636063613. The next prime is 636063661. The reversal of 636063660 is 66360636.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (636063661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1072324 + ... + 1072916.

It is an arithmetic number, because the mean of its divisors is an integer number (13783770).

Almost surely, 2^636063660 is an apocalyptic number.

636063660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636063660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992431440).

636063660 is an abundant number, since it is smaller than the sum of its proper divisors (1348799220).

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

636063660 is a wasteful number, since it uses less digits than its factorization.

636063660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768 (or 763 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 36.

The square root of 636063660 is about 25220.3025358539. The cubic root of 636063660 is about 860.0034523027.

The spelling of 636063660 in words is "six hundred thirty-six million, sixty-three thousand, six hundred sixty".