636843348636 has 24 divisors (see below), whose sum is σ = 1621055796864. Its totient is φ = 192982832880.

The previous prime is 636843348613. The next prime is 636843348649.

636843348636 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 636843348636.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2412285280 + ... + 2412285543.

It is an arithmetic number, because the mean of its divisors is an integer number (67543991536).

Almost surely, 2^636843348636 is an apocalyptic number.

636843348636 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

636843348636 is an abundant number, since it is smaller than the sum of its proper divisors (984212448228).

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

636843348636 is a wasteful number, since it uses less digits than its factorization.

636843348636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4824570841 (or 4824570839 counting only the distinct ones).

The product of its digits is 107495424, while the sum is 60.

The spelling of 636843348636 in words is "six hundred thirty-six billion, eight hundred forty-three million, three hundred forty-eight thousand, six hundred thirty-six".