636011012 has 48 divisors (see below), whose sum is σ = 1372627200. Its totient is φ = 251102592.

The previous prime is 636011011. The next prime is 636011017. The reversal of 636011012 is 210110636.

It is not an unprimeable number, because it can be changed into a prime (636011011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216578 + ... + 219494.

It is an arithmetic number, because the mean of its divisors is an integer number (28596400).

Almost surely, 2^636011012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636011012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686313600).

636011012 is an abundant number, since it is smaller than the sum of its proper divisors (736616188).

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

636011012 is a wasteful number, since it uses less digits than its factorization.

636011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3540 (or 3538 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 636011012 is about 25219.2587519935. The cubic root of 636011012 is about 859.9797236972.

Adding to 636011012 its reverse (210110636), we get a palindrome (846121648).

The spelling of 636011012 in words is "six hundred thirty-six million, eleven thousand, twelve".