12724637765245 has 12 divisors (see below), whose sum is σ = 17762555574684. Its totient is φ = 8725465896000.

The previous prime is 12724637765237. The next prime is 12724637765251. The reversal of 12724637765245 is 54256773642721.

It can be written as a sum of positive squares in 2 ways, for example, as 5172727055769 + 7551910709476 = 2274363^2 + 2748074^2 .

It is not a de Polignac number, because 12724637765245 - 2³ = 12724637765237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25968648256 + ... + 25968648745.

It is an arithmetic number, because the mean of its divisors is an integer number (1480212964557).

Almost surely, 2^{12724637765245} is an apocalyptic number.

It is an amenable number.

12724637765245 is a deficient number, since it is larger than the sum of its proper divisors (5037917809439).

12724637765245 is an equidigital number, since it uses as much as digits as its factorization.

12724637765245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51937297020 (or 51937297013 counting only the distinct ones).

The product of its digits is 118540800, while the sum is 61.

The spelling of 12724637765245 in words is "twelve trillion, seven hundred twenty-four billion, six hundred thirty-seven million, seven hundred sixty-five thousand, two hundred forty-five".