12537032549 has 4 divisors (see below), whose sum is σ = 12574234764. Its totient is φ = 12499830336.

The previous prime is 12537032539. The next prime is 12537032633. The reversal of 12537032549 is 94523073521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94523073521 = 1439 ⋅65686639.

It can be written as a sum of positive squares in 2 ways, for example, as 3762963649 + 8774068900 = 61343^2 + 93670^2 .

It is a cyclic number.

It is not a de Polignac number, because 12537032549 - 2⁸ = 12537032293 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 (12537032539) 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, 18600602 + ... + 18601275.

It is an arithmetic number, because the mean of its divisors is an integer number (3143558691).

Almost surely, 2^12537032549 is an apocalyptic number.

It is an amenable number.

12537032549 is a deficient number, since it is larger than the sum of its proper divisors (37202215).

12537032549 is an equidigital number, since it uses as much as digits as its factorization.

12537032549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37202214.

The product of its (nonzero) digits is 226800, while the sum is 41.

The spelling of 12537032549 in words is "twelve billion, five hundred thirty-seven million, thirty-two thousand, five hundred forty-nine".