636830344542 has 64 divisors (see below), whose sum is σ = 1465674278400. Its totient is φ = 180694260864.

The previous prime is 636830344511. The next prime is 636830344543. The reversal of 636830344542 is 245443038636.

It is a junction number, because it is equal to n+sod(n) for n = 636830344491 and 636830344500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636830344543) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 55646673 + ... + 55658115.

It is an arithmetic number, because the mean of its divisors is an integer number (22901160600).

Almost surely, 2^636830344542 is an apocalyptic number.

636830344542 is an abundant number, since it is smaller than the sum of its proper divisors (828843933858).

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

636830344542 is a wasteful number, since it uses less digits than its factorization.

636830344542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20497.

The product of its (nonzero) digits is 4976640, while the sum is 48.

The spelling of 636830344542 in words is "six hundred thirty-six billion, eight hundred thirty million, three hundred forty-four thousand, five hundred forty-two".