123443324520 has 64 divisors (see below), whose sum is σ = 389821032000. Its totient is φ = 31185681408.

The previous prime is 123443324471. The next prime is 123443324533. The reversal of 123443324520 is 25423344321.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27068625 + ... + 27073184.

It is an arithmetic number, because the mean of its divisors is an integer number (6090953625).

Almost surely, 2^123443324520 is an apocalyptic number.

123443324520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123443324520 is an abundant number, since it is smaller than the sum of its proper divisors (266377707480).

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

123443324520 is a wasteful number, since it uses less digits than its factorization.

123443324520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54141842 (or 54141838 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 33.

Adding to 123443324520 its reverse (25423344321), we get a palindrome (148866668841).

The spelling of 123443324520 in words is "one hundred twenty-three billion, four hundred forty-three million, three hundred twenty-four thousand, five hundred twenty".