12530641647 has 4 divisors (see below), whose sum is σ = 16707522200. Its totient is φ = 8353761096.

The previous prime is 12530641637. The next prime is 12530641693. The reversal of 12530641647 is 74614603521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74614603521 = 3 ⋅24871534507.

It is not a de Polignac number, because 12530641647 - 2⁴ = 12530641631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12530641637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2088440272 + ... + 2088440277.

It is an arithmetic number, because the mean of its divisors is an integer number (4176880550).

Almost surely, 2^12530641647 is an apocalyptic number.

12530641647 is a deficient number, since it is larger than the sum of its proper divisors (4176880553).

12530641647 is an equidigital number, since it uses as much as digits as its factorization.

12530641647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4176880552.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 12530641647 in words is "twelve billion, five hundred thirty million, six hundred forty-one thousand, six hundred forty-seven".