636342745065 has 16 divisors (see below), whose sum is σ = 1032095632128. Its totient is φ = 334733717376.

The previous prime is 636342745061. The next prime is 636342745099. The reversal of 636342745065 is 560547243636.

It is not a de Polignac number, because 636342745065 - 2² = 636342745061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 636342744999 and 636342745017.

It is not an unprimeable number, because it can be changed into a prime (636342745061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290566369 + ... + 290568558.

It is an arithmetic number, because the mean of its divisors is an integer number (64505977008).

Almost surely, 2^636342745065 is an apocalyptic number.

It is an amenable number.

636342745065 is a deficient number, since it is larger than the sum of its proper divisors (395752887063).

636342745065 is a wasteful number, since it uses less digits than its factorization.

636342745065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581135008.

The product of its (nonzero) digits is 10886400, while the sum is 51.

The spelling of 636342745065 in words is "six hundred thirty-six billion, three hundred forty-two million, seven hundred forty-five thousand, sixty-five".