636814868714 has 4 divisors (see below), whose sum is σ = 955222303074. Its totient is φ = 318407434356.

The previous prime is 636814868663. The next prime is 636814868719. The reversal of 636814868714 is 417868418636.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 635886630625 + 928238089 = 797425^2 + 30467^2 .

It is not an unprimeable number, because it can be changed into a prime (636814868719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159203717177 + ... + 159203717180.

Almost surely, 2^636814868714 is an apocalyptic number.

636814868714 is a deficient number, since it is larger than the sum of its proper divisors (318407434360).

636814868714 is a wasteful number, since it uses less digits than its factorization.

636814868714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318407434359.

The product of its digits is 37158912, while the sum is 62.

The spelling of 636814868714 in words is "six hundred thirty-six billion, eight hundred fourteen million, eight hundred sixty-eight thousand, seven hundred fourteen".