2163636036 has 144 divisors (see below), whose sum is σ = 6267590784. Its totient is φ = 649161216.

The previous prime is 2163636017. The next prime is 2163636067. The reversal of 2163636036 is 6306363612.

It is a happy number.

2163636036 is a `hidden beast` number, since 2 + 16 + 3 + 636 + 0 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 377206 + ... + 382898.

It is an arithmetic number, because the mean of its divisors is an integer number (43524936).

Almost surely, 2^2163636036 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2163636036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3133795392).

2163636036 is an abundant number, since it is smaller than the sum of its proper divisors (4103954748).

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

2163636036 is a wasteful number, since it uses less digits than its factorization.

2163636036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5752 (or 5738 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 36.

The square root of 2163636036 is about 46514.9012253063. The cubic root of 2163636036 is about 1293.3857409297.

Adding to 2163636036 its reverse (6306363612), we get a palindrome (8469999648).

The spelling of 2163636036 in words is "two billion, one hundred sixty-three million, six hundred thirty-six thousand, thirty-six".