12005412455550 has 96 divisors (see below), whose sum is σ = 31411194376320. Its totient is φ = 3026099606400.

The previous prime is 12005412455539. The next prime is 12005412455651. The reversal of 12005412455550 is 5555421450021.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12005412455499 and 12005412455508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3491881 + ... + 6016980.

It is an arithmetic number, because the mean of its divisors is an integer number (327199941420).

Almost surely, 2^{12005412455550} is an apocalyptic number.

12005412455550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12005412455550 is an abundant number, since it is smaller than the sum of its proper divisors (19405781920770).

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

12005412455550 is a wasteful number, since it uses less digits than its factorization.

12005412455550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9509338 (or 9509333 counting only the distinct ones).

The product of its (nonzero) digits is 200000, while the sum is 39.

The spelling of 12005412455550 in words is "twelve trillion, five billion, four hundred twelve million, four hundred fifty-five thousand, five hundred fifty".