12530768405 has 4 divisors (see below), whose sum is σ = 15036922092. Its totient is φ = 10024614720.

The previous prime is 12530768389. The next prime is 12530768423. The reversal of 12530768405 is 50486703521.

12530768405 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, and also an emirpimes, since its reverse is a distinct semiprime: 50486703521 = 307 ⋅164451803.

It can be written as a sum of positive squares in 2 ways, for example, as 4121511601 + 8409256804 = 64199^2 + 91702^2 .

It is not a de Polignac number, because 12530768405 - 2⁴ = 12530768389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1253076836 + ... + 1253076845.

It is an arithmetic number, because the mean of its divisors is an integer number (3759230523).

Almost surely, 2^12530768405 is an apocalyptic number.

It is an amenable number.

12530768405 is a deficient number, since it is larger than the sum of its proper divisors (2506153687).

12530768405 is an equidigital number, since it uses as much as digits as its factorization.

12530768405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2506153686.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 12530768405 in words is "twelve billion, five hundred thirty million, seven hundred sixty-eight thousand, four hundred five".