643530110004 has 36 divisors (see below), whose sum is σ = 1628231500896. Its totient is φ = 214308227088.

The previous prime is 643530109993. The next prime is 643530110009. The reversal of 643530110004 is 400011035346.

643530110004 is a `hidden beast` number, since 643 + 5 + 3 + 0 + 1 + 10 + 0 + 0 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 643530110004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643530110009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8369934 + ... + 8446469.

Almost surely, 2^643530110004 is an apocalyptic number.

It is an amenable number.

643530110004 is an abundant number, since it is smaller than the sum of its proper divisors (984701390892).

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

643530110004 is a wasteful number, since it uses less digits than its factorization.

643530110004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16817476 (or 16817471 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The spelling of 643530110004 in words is "six hundred forty-three billion, five hundred thirty million, one hundred ten thousand, four".