643443101344346 has 16 divisors (see below), whose sum is σ = 976019992182720. Its totient is φ = 318103183902240.

The previous prime is 643443101344301. The next prime is 643443101344349.

643443101344346 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 643443101344294 and 643443101344303.

It is not an unprimeable number, because it can be changed into a prime (643443101344349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3810356 + ... + 36074991.

It is an arithmetic number, because the mean of its divisors is an integer number (61001249511420).

Almost surely, 2^{643443101344346} is an apocalyptic number.

643443101344346 is a deficient number, since it is larger than the sum of its proper divisors (332576890838374).

643443101344346 is a wasteful number, since it uses less digits than its factorization.

643443101344346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39976069.

The product of its (nonzero) digits is 11943936, while the sum is 50.

It can be divided in two parts, 64344310 and 1344346, that added together give a palindrome (65688656).

The spelling of 643443101344346 in words is "six hundred forty-three trillion, four hundred forty-three billion, one hundred one million, three hundred forty-four thousand, three hundred forty-six".