643108684683 has 8 divisors (see below), whose sum is σ = 858423650368. Its totient is φ = 428266421064.

The previous prime is 643108684679. The next prime is 643108684759. The reversal of 643108684683 is 386486801346.

643108684683 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 643108684683 - 2² = 643108684679 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643104684683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118172341 + ... + 118177782.

It is an arithmetic number, because the mean of its divisors is an integer number (107302956296).

Almost surely, 2^643108684683 is an apocalyptic number.

643108684683 is a deficient number, since it is larger than the sum of its proper divisors (215314965685).

643108684683 is a wasteful number, since it uses less digits than its factorization.

643108684683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236351033.

The product of its (nonzero) digits is 15925248, while the sum is 57.

The spelling of 643108684683 in words is "six hundred forty-three billion, one hundred eight million, six hundred eighty-four thousand, six hundred eighty-three".