636082771844 has 48 divisors (see below), whose sum is σ = 1222218401712. Its totient is φ = 287881039872.

The previous prime is 636082771787. The next prime is 636082771957. The reversal of 636082771844 is 448177280636.

It can be written as a sum of positive squares in 8 ways, for example, as 106986559744 + 529096212100 = 327088^2 + 727390^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 636082771844.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172412 + ... + 1141004.

It is an arithmetic number, because the mean of its divisors is an integer number (25462883369).

Almost surely, 2^636082771844 is an apocalyptic number.

It is an amenable number.

636082771844 is a deficient number, since it is larger than the sum of its proper divisors (586135629868).

636082771844 is a wasteful number, since it uses less digits than its factorization.

636082771844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968856 (or 968854 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 56.

The spelling of 636082771844 in words is "six hundred thirty-six billion, eighty-two million, seven hundred seventy-one thousand, eight hundred forty-four".