12365715449 has 4 divisors (see below), whose sum is σ = 12792119460. Its totient is φ = 11939311440.

The previous prime is 12365715443. The next prime is 12365715487. The reversal of 12365715449 is 94451756321.

It is a happy number.

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 2021401600 + 10344313849 = 44960^2 + 101707^2 .

It is a cyclic number.

It is not a de Polignac number, because 12365715449 - 2²⁴ = 12348938233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12365715443) 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, 213201962 + ... + 213202019.

It is an arithmetic number, because the mean of its divisors is an integer number (3198029865).

Almost surely, 2^12365715449 is an apocalyptic number.

It is an amenable number.

12365715449 is a deficient number, since it is larger than the sum of its proper divisors (426404011).

12365715449 is an equidigital number, since it uses as much as digits as its factorization.

12365715449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426404010.

The product of its digits is 907200, while the sum is 47.

The spelling of 12365715449 in words is "twelve billion, three hundred sixty-five million, seven hundred fifteen thousand, four hundred forty-nine".