636622086760 has 48 divisors (see below), whose sum is σ = 1574455875300. Its totient is φ = 231498938880.

The previous prime is 636622086713. The next prime is 636622086767. The reversal of 636622086760 is 67680226636.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 636602919876 + 19166884 = 797874^2 + 4378^2 .

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 636622086698 and 636622086707.

It is not an unprimeable number, because it can be changed into a prime (636622086767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65761905 + ... + 65771584.

Almost surely, 2^636622086760 is an apocalyptic number.

It is an amenable number.

636622086760 is an abundant number, since it is smaller than the sum of its proper divisors (937833788540).

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

636622086760 is a wasteful number, since it uses less digits than its factorization.

636622086760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131533522 (or 131533507 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 52.

The spelling of 636622086760 in words is "six hundred thirty-six billion, six hundred twenty-two million, eighty-six thousand, seven hundred sixty".