12215369545 has 4 divisors (see below), whose sum is σ = 14658443460. Its totient is φ = 9772295632.

The previous prime is 12215369521. The next prime is 12215369557. The reversal of 12215369545 is 54596351221.

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 5851638016 + 6363731529 = 76496^2 + 79773^2 .

It is a cyclic number.

It is not a de Polignac number, because 12215369545 - 2³¹ = 10067885897 is a prime.

It is an unprimeable number.

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, 1221536950 + ... + 1221536959.

It is an arithmetic number, because the mean of its divisors is an integer number (3664610865).

Almost surely, 2^12215369545 is an apocalyptic number.

It is an amenable number.

12215369545 is a deficient number, since it is larger than the sum of its proper divisors (2443073915).

12215369545 is an equidigital number, since it uses as much as digits as its factorization.

12215369545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443073914.

The product of its digits is 324000, while the sum is 43.

The spelling of 12215369545 in words is "twelve billion, two hundred fifteen million, three hundred sixty-nine thousand, five hundred forty-five".