643324245234 has 96 divisors (see below), whose sum is σ = 1481312600064. Its totient is φ = 184372172160.

The previous prime is 643324245199. The next prime is 643324245251. The reversal of 643324245234 is 432542423346.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11997327 + ... + 12050829.

It is an arithmetic number, because the mean of its divisors is an integer number (15430339584).

Almost surely, 2^643324245234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 643324245234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (740656300032).

643324245234 is an abundant number, since it is smaller than the sum of its proper divisors (837988354830).

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

643324245234 is a wasteful number, since it uses less digits than its factorization.

643324245234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53720 (or 53631 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 42.

The spelling of 643324245234 in words is "six hundred forty-three billion, three hundred twenty-four million, two hundred forty-five thousand, two hundred thirty-four".