643108116 has 48 divisors (see below), whose sum is σ = 1743082880. Its totient is φ = 180731520.

The previous prime is 643108093. The next prime is 643108127. The reversal of 643108116 is 611801346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57631 + ... + 67878.

Almost surely, 2^643108116 is an apocalyptic number.

It is an amenable number.

643108116 is an abundant number, since it is smaller than the sum of its proper divisors (1099974764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643108116 is a wasteful number, since it uses less digits than its factorization.

643108116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125584 (or 125582 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 643108116 is about 25359.5764160208. The cubic root of 643108116 is about 863.1666722943.

The spelling of 643108116 in words is "six hundred forty-three million, one hundred eight thousand, one hundred sixteen".