12015622505 has 4 divisors (see below), whose sum is σ = 14418747012. Its totient is φ = 9612498000.

The previous prime is 12015622501. The next prime is 12015622511. The reversal of 12015622505 is 50522651021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1862440336 + 10153182169 = 43156^2 + 100763^2 .

It is not a de Polignac number, because 12015622505 - 2² = 12015622501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12015622501) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1201562246 + ... + 1201562255.

It is an arithmetic number, because the mean of its divisors is an integer number (3604686753).

Almost surely, 2^12015622505 is an apocalyptic number.

It is an amenable number.

12015622505 is a deficient number, since it is larger than the sum of its proper divisors (2403124507).

12015622505 is an equidigital number, since it uses as much as digits as its factorization.

12015622505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403124506.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 12015622505 in words is "twelve billion, fifteen million, six hundred twenty-two thousand, five hundred five".