13247764449 has 4 divisors (see below), whose sum is σ = 17663685936. Its totient is φ = 8831842964.

The previous prime is 13247764399. The next prime is 13247764483. The reversal of 13247764449 is 94446774231.

It is a happy number.

13247764449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13247764449 - 2¹¹ = 13247762401 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13247764499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2207960739 + ... + 2207960744.

It is an arithmetic number, because the mean of its divisors is an integer number (4415921484).

Almost surely, 2^13247764449 is an apocalyptic number.

It is an amenable number.

13247764449 is a deficient number, since it is larger than the sum of its proper divisors (4415921487).

13247764449 is an equidigital number, since it uses as much as digits as its factorization.

13247764449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4415921486.

The product of its digits is 4064256, while the sum is 51.

The spelling of 13247764449 in words is "thirteen billion, two hundred forty-seven million, seven hundred sixty-four thousand, four hundred forty-nine".