643326623304 has 16 divisors (see below), whose sum is σ = 1608316558320. Its totient is φ = 214442207760.

The previous prime is 643326623293. The next prime is 643326623339. The reversal of 643326623304 is 403326623346.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13402637962 + ... + 13402638009.

It is an arithmetic number, because the mean of its divisors is an integer number (100519784895).

Almost surely, 2^643326623304 is an apocalyptic number.

It is an amenable number.

643326623304 is an abundant number, since it is smaller than the sum of its proper divisors (964989935016).

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

643326623304 is a wasteful number, since it uses less digits than its factorization.

643326623304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26805275980 (or 26805275976 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 42.

Adding to 643326623304 its sum of digits (42), we get a palindrome (643326623346).

The spelling of 643326623304 in words is "six hundred forty-three billion, three hundred twenty-six million, six hundred twenty-three thousand, three hundred four".