636817340005 has 48 divisors (see below), whose sum is σ = 1011921704064. Its totient is φ = 379717134720.

The previous prime is 636817339859. The next prime is 636817340011. The reversal of 636817340005 is 500043718636.

It is not a de Polignac number, because 636817340005 - 2²¹ = 636815242853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5074882 + ... + 5198851.

It is an arithmetic number, because the mean of its divisors is an integer number (21081702168).

Almost surely, 2^636817340005 is an apocalyptic number.

It is an amenable number.

636817340005 is a deficient number, since it is larger than the sum of its proper divisors (375104364059).

636817340005 is a wasteful number, since it uses less digits than its factorization.

636817340005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10273786 (or 10273779 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 636817340005 in words is "six hundred thirty-six billion, eight hundred seventeen million, three hundred forty thousand, five".