63636365 has 16 divisors (see below), whose sum is σ = 83093808. Its totient is φ = 46503936.

The previous prime is 63636361. The next prime is 63636367. The reversal of 63636365 is 56363636.

63636365 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 5098564 + 58537801 = 2258^2 + 7651^2 .

It is a cyclic number.

It is not a de Polignac number, because 63636365 - 2² = 63636361 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63636361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1259 + ... + 11351.

It is an arithmetic number, because the mean of its divisors is an integer number (5193363).

Almost surely, 2^63636365 is an apocalyptic number.

63636365 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

63636365 is a deficient number, since it is larger than the sum of its proper divisors (19457443).

63636365 is a wasteful number, since it uses less digits than its factorization.

63636365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10208.

The product of its digits is 174960, while the sum is 38.

The square root of 63636365 is about 7977.2404376451. The cubic root of 63636365 is about 399.2409877453.

The spelling of 63636365 in words is "sixty-three million, six hundred thirty-six thousand, three hundred sixty-five".