643223322346 has 48 divisors (see below), whose sum is σ = 1073833334784. Its totient is φ = 288719420000.

The previous prime is 643223322319. The next prime is 643223322347.

643223322346 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 643223322299 and 643223322308.

It is not an unprimeable number, because it can be changed into a prime (643223322347) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9326931 + ... + 9395641.

It is an arithmetic number, because the mean of its divisors is an integer number (22371527808).

Almost surely, 2^643223322346 is an apocalyptic number.

643223322346 is a deficient number, since it is larger than the sum of its proper divisors (430610012438).

643223322346 is a wasteful number, since it uses less digits than its factorization.

643223322346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69219 (or 69208 counting only the distinct ones).

The product of its digits is 746496, while the sum is 40.

It can be divided in two parts, 643223 and 322346, that added together give a palindrome (965569).

The spelling of 643223322346 in words is "six hundred forty-three billion, two hundred twenty-three million, three hundred twenty-two thousand, three hundred forty-six".