12005509005 has 96 divisors (see below), whose sum is σ = 25130476800. Its totient is φ = 5179355136.

The previous prime is 12005508979. The next prime is 12005509007. The reversal of 12005509005 is 50090550021.

12005509005 is a `hidden beast` number, since 1 + 20 + 0 + 550 + 90 + 0 + 5 = 666.

It is not a de Polignac number, because 12005509005 - 2⁷ = 12005508877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12005509005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12005509007) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1606237 + ... + 1613693.

It is an arithmetic number, because the mean of its divisors is an integer number (261775800).

Almost surely, 2^12005509005 is an apocalyptic number.

12005509005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12005509005 is an abundant number, since it is smaller than the sum of its proper divisors (13124967795).

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

12005509005 is a wasteful number, since it uses less digits than its factorization.

12005509005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7763 (or 7760 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The spelling of 12005509005 in words is "twelve billion, five million, five hundred nine thousand, five".