13378717349 has 12 divisors (see below), whose sum is σ = 14467973100. Its totient is φ = 12355742784.

The previous prime is 13378717343. The next prime is 13378717357. The reversal of 13378717349 is 94371787331.

It can be written as a sum of positive squares in 2 ways, for example, as 11120757025 + 2257960324 = 105455^2 + 47518^2 .

It is not a de Polignac number, because 13378717349 - 2⁴ = 13378717333 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13378717349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13378717343) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 420704 + ... + 451385.

It is an arithmetic number, because the mean of its divisors is an integer number (1205664425).

Almost surely, 2^13378717349 is an apocalyptic number.

It is an amenable number.

13378717349 is a deficient number, since it is larger than the sum of its proper divisors (1089255751).

13378717349 is an equidigital number, since it uses as much as digits as its factorization.

13378717349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872164 (or 872141 counting only the distinct ones).

The product of its digits is 2667168, while the sum is 53.

The spelling of 13378717349 in words is "thirteen billion, three hundred seventy-eight million, seven hundred seventeen thousand, three hundred forty-nine".