12215529663 has 4 divisors (see below), whose sum is σ = 16287372888. Its totient is φ = 8143686440.

The previous prime is 12215529661. The next prime is 12215529691. The reversal of 12215529663 is 36692551221.

It is a happy number.

12215529663 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12215529663 - 2¹ = 12215529661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12215529661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2035921608 + ... + 2035921613.

It is an arithmetic number, because the mean of its divisors is an integer number (4071843222).

Almost surely, 2^12215529663 is an apocalyptic number.

12215529663 is a deficient number, since it is larger than the sum of its proper divisors (4071843225).

12215529663 is an equidigital number, since it uses as much as digits as its factorization.

12215529663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4071843224.

The product of its digits is 194400, while the sum is 42.

The spelling of 12215529663 in words is "twelve billion, two hundred fifteen million, five hundred twenty-nine thousand, six hundred sixty-three".