5643156636 has 144 divisors (see below), whose sum is σ = 16211089440. Its totient is φ = 1640839680.

The previous prime is 5643156601. The next prime is 5643156671. The reversal of 5643156636 is 6366513465.

5643156636 is a `hidden beast` number, since 5 + 6 + 4 + 3 + 1 + 5 + 6 + 636 = 666.

It is an interprime number because it is at equal distance from previous prime (5643156601) and next prime (5643156671).

It is a junction number, because it is equal to n+sod(n) for n = 5643156591 and 5643156600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6873106 + ... + 6873926.

It is an arithmetic number, because the mean of its divisors is an integer number (112577010).

Almost surely, 2^5643156636 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 5643156636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8105544720).

5643156636 is an abundant number, since it is smaller than the sum of its proper divisors (10567932804).

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

5643156636 is a wasteful number, since it uses less digits than its factorization.

5643156636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636 (or 1631 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 45.

The square root of 5643156636 is about 75120.9467192740. The cubic root of 5643156636 is about 1780.3581146236.

The spelling of 5643156636 in words is "five billion, six hundred forty-three million, one hundred fifty-six thousand, six hundred thirty-six".