643342243346 has 8 divisors (see below), whose sum is σ = 1052741852784. Its totient is φ = 292428292420.

The previous prime is 643342243337. The next prime is 643342243429.

643342243346 is nontrivially palindromic in base 10.

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 = 643342243297 and 643342243306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14621414600 + ... + 14621414643.

It is an arithmetic number, because the mean of its divisors is an integer number (131592731598).

Almost surely, 2^643342243346 is an apocalyptic number.

643342243346 is a deficient number, since it is larger than the sum of its proper divisors (409399609438).

643342243346 is a wasteful number, since it uses less digits than its factorization.

643342243346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29242829256.

The product of its digits is 2985984, while the sum is 44.

It can be divided in two parts, 643342 and 243346, that added together give a palindrome (886688).

The spelling of 643342243346 in words is "six hundred forty-three billion, three hundred forty-two million, two hundred forty-three thousand, three hundred forty-six".