643058502128 has 40 divisors (see below), whose sum is σ = 1423980942720. Its totient is φ = 275583787200.

The previous prime is 643058502089. The next prime is 643058502179. The reversal of 643058502128 is 821205850346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2547203 + ... + 2788253.

It is an arithmetic number, because the mean of its divisors is an integer number (35599523568).

Almost surely, 2^643058502128 is an apocalyptic number.

It is an amenable number.

643058502128 is an abundant number, since it is smaller than the sum of its proper divisors (780922440592).

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

643058502128 is a wasteful number, since it uses less digits than its factorization.

643058502128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264885 (or 264879 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 643058502128 in words is "six hundred forty-three billion, fifty-eight million, five hundred two thousand, one hundred twenty-eight".