12323209557128 has 36 divisors (see below), whose sum is σ = 23608989309735. Its totient is φ = 6030278436816.

The previous prime is 12323209557107. The next prime is 12323209557179. The reversal of 12323209557128 is 82175590232321.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 6161604778564 + 6161604778564 = 2482258^2 + 2482258^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=2482258.

It is a super-2 number, since 2×12323209557128² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 466651301 + ... + 466677707.

Almost surely, 2^{12323209557128} is an apocalyptic number.

It is an amenable number.

12323209557128 is a deficient number, since it is larger than the sum of its proper divisors (11285779752607).

12323209557128 is an frugal number, since it uses more digits than its factorization.

12323209557128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52914 (or 26456 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 50.

Multiplying 12323209557128 by its sum of digits (50), we get a square (616160477856400 = 24822580²).

Adding to 12323209557128 its reverse (82175590232321), we get a palindrome (94498799789449).

The spelling of 12323209557128 in words is "twelve trillion, three hundred twenty-three billion, two hundred nine million, five hundred fifty-seven thousand, one hundred twenty-eight".