636361 has 16 divisors (see below), whose sum is σ = 762048. Its totient is φ = 524800.

The previous prime is 636359. The next prime is 636403. The reversal of 636361 is 163636.

It is not a de Polignac number, because 636361 - 2¹ = 636359 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (636301) 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, 7626 + ... + 7708.

It is an arithmetic number, because the mean of its divisors is an integer number (47628).

2⁶³⁶³⁶¹ is an apocalyptic number.

It is an amenable number.

636361 is a deficient number, since it is larger than the sum of its proper divisors (125687).

636361 is a wasteful number, since it uses less digits than its factorization.

636361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152.

The product of its digits is 1944, while the sum is 25.

The square root of 636361 is about 797.7223827874. The cubic root of 636361 is about 86.0137439725.

Adding to 636361 its reverse (163636), we get a palindrome (799997).

The spelling of 636361 in words is "six hundred thirty-six thousand, three hundred sixty-one".