643925211234 has 16 divisors (see below), whose sum is σ = 1363606329888. Its totient is φ = 202015752512.

The previous prime is 643925211221. The next prime is 643925211287. The reversal of 643925211234 is 432112529346.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3156496032 + ... + 3156496235.

It is an arithmetic number, because the mean of its divisors is an integer number (85225395618).

Almost surely, 2^643925211234 is an apocalyptic number.

643925211234 is an abundant number, since it is smaller than the sum of its proper divisors (719681118654).

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

643925211234 is a wasteful number, since it uses less digits than its factorization.

643925211234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6312992289.

The product of its digits is 311040, while the sum is 42.

The spelling of 643925211234 in words is "six hundred forty-three billion, nine hundred twenty-five million, two hundred eleven thousand, two hundred thirty-four".