12441778367309 has 4 divisors (see below), whose sum is σ = 12441926798940. Its totient is φ = 12441629935680.

The previous prime is 12441778367209. The next prime is 12441778367327. The reversal of 12441778367309 is 90376387714421.

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 5163815394409 + 7277962972900 = 2272403^2 + 2697770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12441778367309 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 (12441778367209) 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, 74090012 + ... + 74257749.

It is an arithmetic number, because the mean of its divisors is an integer number (3110481699735).

Almost surely, 2^{12441778367309} is an apocalyptic number.

It is an amenable number.

12441778367309 is a deficient number, since it is larger than the sum of its proper divisors (148431631).

12441778367309 is an equidigital number, since it uses as much as digits as its factorization.

12441778367309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148431630.

The product of its (nonzero) digits is 42674688, while the sum is 62.

The spelling of 12441778367309 in words is "twelve trillion, four hundred forty-one billion, seven hundred seventy-eight million, three hundred sixty-seven thousand, three hundred nine".