636601648336 has 20 divisors (see below), whose sum is σ = 1236722449732. Its totient is φ = 317447467776.

The previous prime is 636601648303. The next prime is 636601648337. The reversal of 636601648336 is 633846106636.

It can be written as a sum of positive squares in 2 ways, for example, as 170172750400 + 466428897936 = 412520^2 + 682956^2 .

It is a super-2 number, since 2×636601648336² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636601648337) 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, 53328621 + ... + 53340556.

Almost surely, 2^636601648336 is an apocalyptic number.

It is an amenable number.

636601648336 is a deficient number, since it is larger than the sum of its proper divisors (600120801396).

636601648336 is a wasteful number, since it uses less digits than its factorization.

636601648336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106669558 (or 106669552 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 52.

The spelling of 636601648336 in words is "six hundred thirty-six billion, six hundred one million, six hundred forty-eight thousand, three hundred thirty-six".