643243101342346 has 8 divisors (see below), whose sum is σ = 966180974869764. Its totient is φ = 321182776385760.

The previous prime is 643243101342337. The next prime is 643243101342349.

643243101342346 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 420967354865121 + 222275746477225 = 20517489^2 + 14908915^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 643243101342296 and 643243101342305.

It is not an unprimeable number, because it can be changed into a prime (643243101342349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219387140875 + ... + 219387143806.

Almost surely, 2^{643243101342346} is an apocalyptic number.

643243101342346 is a deficient number, since it is larger than the sum of its proper divisors (322937873527418).

643243101342346 is a wasteful number, since it uses less digits than its factorization.

643243101342346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438774285416.

The product of its (nonzero) digits is 2985984, while the sum is 46.

It can be divided in two parts, 64324310 and 1342346, that added together give a palindrome (65666656).

The spelling of 643243101342346 in words is "six hundred forty-three trillion, two hundred forty-three billion, one hundred one million, three hundred forty-two thousand, three hundred forty-six".