643612382204 has 12 divisors (see below), whose sum is σ = 1228714547928. Its totient is φ = 292551082800.

The previous prime is 643612382183. The next prime is 643612382239. The reversal of 643612382204 is 402283216346.

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, 7313777027 + ... + 7313777114.

It is an arithmetic number, because the mean of its divisors is an integer number (102392878994).

Almost surely, 2^643612382204 is an apocalyptic number.

It is an amenable number.

643612382204 is a deficient number, since it is larger than the sum of its proper divisors (585102165724).

643612382204 is a wasteful number, since it uses less digits than its factorization.

643612382204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14627554156 (or 14627554154 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 41.

The spelling of 643612382204 in words is "six hundred forty-three billion, six hundred twelve million, three hundred eighty-two thousand, two hundred four".