636022200100 has 81 divisors (see below), whose sum is σ = 1605642686067. Its totient is φ = 218045614080.

The previous prime is 636022200097. The next prime is 636022200109. The reversal of 636022200100 is 1002220636.

It is a happy number.

The square root of 636022200100 is 797510.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 8035688164 + 627986511936 = 89642^2 + 792456^2 .

It is not an unprimeable number, because it can be changed into a prime (636022200109) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 55820004 + ... + 55831396.

Almost surely, 2^636022200100 is an apocalyptic number.

636022200100 is the 797510-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636022200100

636022200100 is an abundant number, since it is smaller than the sum of its proper divisors (969620485967).

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

636022200100 is an equidigital number, since it uses as much as digits as its factorization.

636022200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22814 (or 11407 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 636022200100 its reverse (1002220636), we get a palindrome (637024420736).

The spelling of 636022200100 in words is "six hundred thirty-six billion, twenty-two million, two hundred thousand, one hundred".