636216612 has 12 divisors (see below), whose sum is σ = 1484505456. Its totient is φ = 212072200.

The previous prime is 636216601. The next prime is 636216613. The reversal of 636216612 is 216612636.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (636216613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26509014 + ... + 26509037.

It is an arithmetic number, because the mean of its divisors is an integer number (123708788).

Almost surely, 2^636216612 is an apocalyptic number.

It is an amenable number.

636216612 is an abundant number, since it is smaller than the sum of its proper divisors (848288844).

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

636216612 is a wasteful number, since it uses less digits than its factorization.

636216612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53018058 (or 53018056 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 636216612 is about 25223.3346724814. The cubic root of 636216612 is about 860.0723807838.

The spelling of 636216612 in words is "six hundred thirty-six million, two hundred sixteen thousand, six hundred twelve".