12445505505 has 24 divisors (see below), whose sum is σ = 22510133568. Its totient is φ = 6349010976.

The previous prime is 12445505497. The next prime is 12445505507. The reversal of 12445505505 is 50550554421.

12445505505 is a `hidden beast` number, since 12 + 4 + 45 + 50 + 550 + 5 = 666.

It is not a de Polignac number, because 12445505505 - 2³ = 12445505497 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12445505505.

It is not an unprimeable number, because it can be changed into a prime (12445505507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6011287 + ... + 6013356.

It is an arithmetic number, because the mean of its divisors is an integer number (937922232).

Almost surely, 2^12445505505 is an apocalyptic number.

12445505505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12445505505 is a deficient number, since it is larger than the sum of its proper divisors (10064628063).

12445505505 is a wasteful number, since it uses less digits than its factorization.

12445505505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12024677 (or 12024674 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 36.

The spelling of 12445505505 in words is "twelve billion, four hundred forty-five million, five hundred five thousand, five hundred five".