636320134836 has 36 divisors (see below), whose sum is σ = 1623508391232. Its totient is φ = 210124404624.

The previous prime is 636320134823. The next prime is 636320134841. The reversal of 636320134836 is 638431023636.

636320134836 is a `hidden beast` number, since 6 + 3 + 632 + 0 + 1 + 3 + 4 + 8 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 636320134791 and 636320134800.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 82592220 + ... + 82599923.

It is an arithmetic number, because the mean of its divisors is an integer number (45097455312).

Almost surely, 2^636320134836 is an apocalyptic number.

It is an amenable number.

636320134836 is an abundant number, since it is smaller than the sum of its proper divisors (987188256396).

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

636320134836 is a wasteful number, since it uses less digits than its factorization.

636320134836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165192260 (or 165192255 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 45.

The spelling of 636320134836 in words is "six hundred thirty-six billion, three hundred twenty million, one hundred thirty-four thousand, eight hundred thirty-six".