643623204606 has 8 divisors (see below), whose sum is σ = 1287246409224. Its totient is φ = 214541068200.

The previous prime is 643623204589. The next prime is 643623204617. The reversal of 643623204606 is 606402326346.

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

643623204606 is an admirable number.

It is a Curzon number.

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, 53635267045 + ... + 53635267056.

It is an arithmetic number, because the mean of its divisors is an integer number (160905801153).

Almost surely, 2^643623204606 is an apocalyptic number.

643623204606 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

643623204606 is a wasteful number, since it uses less digits than its factorization.

643623204606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107270534106.

The product of its (nonzero) digits is 746496, while the sum is 42.

The spelling of 643623204606 in words is "six hundred forty-three billion, six hundred twenty-three million, two hundred four thousand, six hundred six".