12748537049 has 4 divisors (see below), whose sum is σ = 12879965364. Its totient is φ = 12617108736.

The previous prime is 12748537033. The next prime is 12748537051. The reversal of 12748537049 is 94073584721.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94073584721 = 131111 ⋅717511.

It can be written as a sum of positive squares in 2 ways, for example, as 1951872400 + 10796664649 = 44180^2 + 103907^2 .

It is a cyclic number.

It is not a de Polignac number, because 12748537049 - 2⁴ = 12748537033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12748536988 and 12748537006.

It is not an unprimeable number, because it can be changed into a prime (12748537069) 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, 65714012 + ... + 65714205.

It is an arithmetic number, because the mean of its divisors is an integer number (3219991341).

Almost surely, 2^12748537049 is an apocalyptic number.

It is an amenable number.

12748537049 is a deficient number, since it is larger than the sum of its proper divisors (131428315).

12748537049 is an equidigital number, since it uses as much as digits as its factorization.

12748537049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131428314.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 12748537049 in words is "twelve billion, seven hundred forty-eight million, five hundred thirty-seven thousand, forty-nine".