12736549249 has 4 divisors (see below), whose sum is σ = 12736794436. Its totient is φ = 12736304064.

The previous prime is 12736549187. The next prime is 12736549307. The reversal of 12736549249 is 94294563721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12395482225 + 341067024 = 111335^2 + 18468^2 .

It is a cyclic number.

It is not a de Polignac number, because 12736549249 - 2¹³ = 12736541057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12736549196 and 12736549205.

It is not an unprimeable number, because it can be changed into a prime (12736540249) 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, 10524 + ... + 159949.

It is an arithmetic number, because the mean of its divisors is an integer number (3184198609).

Almost surely, 2^12736549249 is an apocalyptic number.

It is an amenable number.

12736549249 is a deficient number, since it is larger than the sum of its proper divisors (245187).

12736549249 is an equidigital number, since it uses as much as digits as its factorization.

12736549249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245186.

The product of its digits is 3265920, while the sum is 52.

The spelling of 12736549249 in words is "twelve billion, seven hundred thirty-six million, five hundred forty-nine thousand, two hundred forty-nine".