2163636544 has 28 divisors (see below), whose sum is σ = 4335988788. Its totient is φ = 1071104000.

The previous prime is 2163636539. The next prime is 2163636551. The reversal of 2163636544 is 4456363612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2069158144 + 94478400 = 45488^2 + 9720^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2163636497 and 2163636506.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 160897 + ... + 173824.

Almost surely, 2^2163636544 is an apocalyptic number.

It is an amenable number.

2163636544 is an abundant number, since it is smaller than the sum of its proper divisors (2172352244).

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

2163636544 is a wasteful number, since it uses less digits than its factorization.

2163636544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334834 (or 334824 counting only the distinct ones).

The product of its digits is 311040, while the sum is 40.

The square root of 2163636544 is about 46514.9066859217. The cubic root of 2163636544 is about 1293.3858421543.

The spelling of 2163636544 in words is "two billion, one hundred sixty-three million, six hundred thirty-six thousand, five hundred forty-four".