636534605117 has 12 divisors (see below), whose sum is σ = 649001330880. Its totient is φ = 624303087408.

The previous prime is 636534605059. The next prime is 636534605153. The reversal of 636534605117 is 711506435636.

It is not a de Polignac number, because 636534605117 - 2⁸ = 636534604861 is a prime.

It is a super-2 number, since 2×636534605117² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636534605177) 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 11 ways as a sum of consecutive naturals, for example, 8183234 + ... + 8260652.

It is an arithmetic number, because the mean of its divisors is an integer number (54083444240).

Almost surely, 2^636534605117 is an apocalyptic number.

It is an amenable number.

636534605117 is a deficient number, since it is larger than the sum of its proper divisors (12466725763).

636534605117 is an equidigital number, since it uses as much as digits as its factorization.

636534605117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80452 (or 80399 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 47.

The spelling of 636534605117 in words is "six hundred thirty-six billion, five hundred thirty-four million, six hundred five thousand, one hundred seventeen".