636344684043 has 8 divisors (see below), whose sum is σ = 848762936208. Its totient is φ = 424078110624.

The previous prime is 636344684011. The next prime is 636344684081. The reversal of 636344684043 is 340486443636.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 636344684043 - 2⁵ = 636344684011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (636344684543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37909896 + ... + 37926677.

It is an arithmetic number, because the mean of its divisors is an integer number (106095367026).

Almost surely, 2^636344684043 is an apocalyptic number.

636344684043 is a deficient number, since it is larger than the sum of its proper divisors (212418252165).

636344684043 is a wasteful number, since it uses less digits than its factorization.

636344684043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75839373.

The product of its (nonzero) digits is 11943936, while the sum is 51.

The spelling of 636344684043 in words is "six hundred thirty-six billion, three hundred forty-four million, six hundred eighty-four thousand, forty-three".