5643237668 has 6 divisors (see below), whose sum is σ = 9875665926. Its totient is φ = 2821618832.

The previous prime is 5643237667. The next prime is 5643237713. The reversal of 5643237668 is 8667323465.

It can be written as a sum of positive squares in only one way, i.e., 4818858724 + 824378944 = 69418^2 + 28712^2 .

It is a super-2 number, since 2×5643237668² = 63692262755068156448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5643237661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 705404705 + ... + 705404712.

It is an arithmetic number, because the mean of its divisors is an integer number (1645944321).

Almost surely, 2^5643237668 is an apocalyptic number.

It is an amenable number.

5643237668 is a deficient number, since it is larger than the sum of its proper divisors (4232428258).

5643237668 is a wasteful number, since it uses less digits than its factorization.

5643237668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410809421 (or 1410809419 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 50.

The square root of 5643237668 is about 75121.4860609134. The cubic root of 5643237668 is about 1780.3666361714.

The spelling of 5643237668 in words is "five billion, six hundred forty-three million, two hundred thirty-seven thousand, six hundred sixty-eight".