12123500656446 has 96 divisors (see below), whose sum is σ = 28775199585600. Its totient is φ = 3671863372800.

The previous prime is 12123500656441. The next prime is 12123500656451. The reversal of 12123500656446 is 64465600532121.

12123500656446 is a `hidden beast` number, since 1 + 2 + 1 + 23 + 500 + 65 + 64 + 4 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (12123500656441) and next prime (12123500656451).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123500656441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79354860 + ... + 79507488.

It is an arithmetic number, because the mean of its divisors is an integer number (299741662350).

Almost surely, 2^{12123500656446} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12123500656446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14387599792800).

12123500656446 is an abundant number, since it is smaller than the sum of its proper divisors (16651698929154).

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

12123500656446 is a wasteful number, since it uses less digits than its factorization.

12123500656446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161634 (or 161631 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 12123500656446 in words is "twelve trillion, one hundred twenty-three billion, five hundred million, six hundred fifty-six thousand, four hundred forty-six".