5643666988 has 12 divisors (see below), whose sum is σ = 9880186680. Its totient is φ = 2820756512.

The previous prime is 5643666947. The next prime is 5643666997. The reversal of 5643666988 is 8896663465.

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, 257398 + ... + 278461.

It is an arithmetic number, because the mean of its divisors is an integer number (823348890).

Almost surely, 2^5643666988 is an apocalyptic number.

It is an amenable number.

5643666988 is a deficient number, since it is larger than the sum of its proper divisors (4236519692).

5643666988 is a wasteful number, since it uses less digits than its factorization.

5643666988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538496 (or 538494 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 61.

The square root of 5643666988 is about 75124.3435112747. The cubic root of 5643666988 is about 1780.4117832818.

The spelling of 5643666988 in words is "five billion, six hundred forty-three million, six hundred sixty-six thousand, nine hundred eighty-eight".