123344555680 has 192 divisors, whose sum is σ = 315950544000. Its totient is φ = 45344821248.

The previous prime is 123344555669. The next prime is 123344555681. The reversal of 123344555680 is 86555443321.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 123344555680.

It is not an unprimeable number, because it can be changed into a prime (123344555681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43753311 + ... + 43756129.

It is an arithmetic number, because the mean of its divisors is an integer number (1645575750).

Almost surely, 2^123344555680 is an apocalyptic number.

123344555680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123344555680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157975272000).

123344555680 is an abundant number, since it is smaller than the sum of its proper divisors (192605988320).

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

123344555680 is a wasteful number, since it uses less digits than its factorization.

123344555680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3279 (or 3271 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 46.

The spelling of 123344555680 in words is "one hundred twenty-three billion, three hundred forty-four million, five hundred fifty-five thousand, six hundred eighty".