643753112 has 16 divisors (see below), whose sum is σ = 1209793200. Its totient is φ = 321141600.

The previous prime is 643753081. The next prime is 643753151. The reversal of 643753112 is 211357346.

643753112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 88139 + ... + 95162.

It is an arithmetic number, because the mean of its divisors is an integer number (75612075).

Almost surely, 2^643753112 is an apocalyptic number.

It is an amenable number.

643753112 is a deficient number, since it is larger than the sum of its proper divisors (566040088).

643753112 is a wasteful number, since it uses less digits than its factorization.

643753112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183746 (or 183742 counting only the distinct ones).

The product of its digits is 15120, while the sum is 32.

The square root of 643753112 is about 25372.2902395507. The cubic root of 643753112 is about 863.4551427273.

The spelling of 643753112 in words is "six hundred forty-three million, seven hundred fifty-three thousand, one hundred twelve".