636580968 has 64 divisors (see below), whose sum is σ = 1610409600. Its totient is φ = 209683200.

The previous prime is 636580961. The next prime is 636580969. The reversal of 636580968 is 869085636.

636580968 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 636580968.

It is not an unprimeable number, because it can be changed into a prime (636580961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 974530 + ... + 975182.

It is an arithmetic number, because the mean of its divisors is an integer number (25162650).

Almost surely, 2^636580968 is an apocalyptic number.

It is an amenable number.

636580968 is an abundant number, since it is smaller than the sum of its proper divisors (973828632).

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

636580968 is a wasteful number, since it uses less digits than its factorization.

636580968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082 (or 1078 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The square root of 636580968 is about 25230.5562364368. The cubic root of 636580968 is about 860.2365349013.

The spelling of 636580968 in words is "six hundred thirty-six million, five hundred eighty thousand, nine hundred sixty-eight".