643124044 has 12 divisors (see below), whose sum is σ = 1126137600. Its totient is φ = 321370448.

The previous prime is 643124011. The next prime is 643124051. The reversal of 643124044 is 440421346.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40204 + ... + 53875.

It is an arithmetic number, because the mean of its divisors is an integer number (93844800).

Almost surely, 2^643124044 is an apocalyptic number.

It is an amenable number.

643124044 is a deficient number, since it is larger than the sum of its proper divisors (483013556).

643124044 is a wasteful number, since it uses less digits than its factorization.

643124044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95792 (or 95790 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 643124044 is about 25359.8904571767. The cubic root of 643124044 is about 863.1737983150.

The spelling of 643124044 in words is "six hundred forty-three million, one hundred twenty-four thousand, forty-four".