636814868712 has 64 divisors (see below), whose sum is σ = 1736845493760. Its totient is φ = 192965572800.

The previous prime is 636814868663. The next prime is 636814868719. The reversal of 636814868712 is 217868418636.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8315637 + ... + 8391867.

It is an arithmetic number, because the mean of its divisors is an integer number (27138210840).

Almost surely, 2^636814868712 is an apocalyptic number.

It is an amenable number.

636814868712 is an abundant number, since it is smaller than the sum of its proper divisors (1100030625048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

636814868712 is a wasteful number, since it uses less digits than its factorization.

636814868712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107894 (or 107890 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 60.

The spelling of 636814868712 in words is "six hundred thirty-six billion, eight hundred fourteen million, eight hundred sixty-eight thousand, seven hundred twelve".