12508563049 has 4 divisors (see below), whose sum is σ = 12527719236. Its totient is φ = 12489406864.

The previous prime is 12508563029. The next prime is 12508563077. The reversal of 12508563049 is 94036580521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94036580521 = 13 ⋅7233583117.

It can be written as a sum of positive squares in 2 ways, for example, as 7163929600 + 5344633449 = 84640^2 + 73107^2 .

It is a cyclic number.

It is not a de Polignac number, because 12508563049 - 2⁵ = 12508563017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12508562996 and 12508563014.

It is not an unprimeable number, because it can be changed into a prime (12508563029) 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, 9577114 + ... + 9578419.

It is an arithmetic number, because the mean of its divisors is an integer number (3131929809).

Almost surely, 2^12508563049 is an apocalyptic number.

It is an amenable number.

12508563049 is a deficient number, since it is larger than the sum of its proper divisors (19156187).

12508563049 is an equidigital number, since it uses as much as digits as its factorization.

12508563049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19156186.

The product of its (nonzero) digits is 259200, while the sum is 43.

The spelling of 12508563049 in words is "twelve billion, five hundred eight million, five hundred sixty-three thousand, forty-nine".