636256226 has 4 divisors (see below), whose sum is σ = 954384342. Its totient is φ = 318128112.

The previous prime is 636256223. The next prime is 636256261. The reversal of 636256226 is 622652636.

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., 584430625 + 51825601 = 24175^2 + 7199^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 636256226.

It is not an unprimeable number, because it can be changed into a prime (636256223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159064055 + ... + 159064058.

Almost surely, 2^636256226 is an apocalyptic number.

636256226 is a deficient number, since it is larger than the sum of its proper divisors (318128116).

636256226 is a wasteful number, since it uses less digits than its factorization.

636256226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318128115.

The product of its digits is 155520, while the sum is 38.

The square root of 636256226 is about 25224.1199251827. The cubic root of 636256226 is about 860.0902312032.

The spelling of 636256226 in words is "six hundred thirty-six million, two hundred fifty-six thousand, two hundred twenty-six".