123443012321552 has 320 divisors, whose sum is σ = 306310129182720. Its totient is φ = 46803369676800.

The previous prime is 123443012321539. The next prime is 123443012321569. The reversal of 123443012321552 is 255123210344321.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2929959527 + ... + 2930001657.

It is an arithmetic number, because the mean of its divisors is an integer number (957219153696).

Almost surely, 2^{123443012321552} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123443012321552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153155064591360).

123443012321552 is an abundant number, since it is smaller than the sum of its proper divisors (182867116861168).

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

123443012321552 is a wasteful number, since it uses less digits than its factorization.

123443012321552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42622 (or 42616 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 123443012321552 its reverse (255123210344321), we get a palindrome (378566222665873).

The spelling of 123443012321552 in words is "one hundred twenty-three trillion, four hundred forty-three billion, twelve million, three hundred twenty-one thousand, five hundred fifty-two".