123643421744 has 20 divisors (see below), whose sum is σ = 243619455720. Its totient is φ = 60773884800.

The previous prime is 123643421731. The next prime is 123643421779. The reversal of 123643421744 is 447124346321.

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, 65488157 + ... + 65490044.

It is an arithmetic number, because the mean of its divisors is an integer number (12180972786).

Almost surely, 2^123643421744 is an apocalyptic number.

It is an amenable number.

123643421744 is a deficient number, since it is larger than the sum of its proper divisors (119976033976).

123643421744 is a wasteful number, since it uses less digits than its factorization.

123643421744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130978268 (or 130978262 counting only the distinct ones).

The product of its digits is 387072, while the sum is 41.

The spelling of 123643421744 in words is "one hundred twenty-three billion, six hundred forty-three million, four hundred twenty-one thousand, seven hundred forty-four".