8809643644 has 36 divisors (see below), whose sum is σ = 16395443064. Its totient is φ = 4141071616.

The previous prime is 8809643621. The next prime is 8809643659. The reversal of 8809643644 is 4463469088.

It is a happy number.

8809643644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×8809643644² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8809643591 and 8809643600.

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 11 ways as a sum of consecutive naturals, for example, 1167267 + ... + 1174789.

It is an arithmetic number, because the mean of its divisors is an integer number (455428974).

Almost surely, 2^8809643644 is an apocalyptic number.

It is an amenable number.

8809643644 is a deficient number, since it is larger than the sum of its proper divisors (7585799420).

8809643644 is a wasteful number, since it uses less digits than its factorization.

8809643644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8574 (or 8555 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 52.

The square root of 8809643644 is about 93859.7019172765. The cubic root of 8809643644 is about 2065.3141178611.

The spelling of 8809643644 in words is "eight billion, eight hundred nine million, six hundred forty-three thousand, six hundred forty-four".