636650132 has 24 divisors (see below), whose sum is σ = 1146278952. Its totient is φ = 309209600.

The previous prime is 636650099. The next prime is 636650141. The reversal of 636650132 is 231056636.

It can be written as a sum of positive squares in 4 ways, for example, as 1811716 + 634838416 = 1346^2 + 25196^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29882 + ... + 46542.

It is an arithmetic number, because the mean of its divisors is an integer number (47761623).

Almost surely, 2^636650132 is an apocalyptic number.

It is an amenable number.

636650132 is a deficient number, since it is larger than the sum of its proper divisors (509628820).

636650132 is a wasteful number, since it uses less digits than its factorization.

636650132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16939 (or 16937 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 636650132 is about 25231.9268388286. The cubic root of 636650132 is about 860.2676884377.

The spelling of 636650132 in words is "six hundred thirty-six million, six hundred fifty thousand, one hundred thirty-two".