13844781479 has 4 divisors (see below), whose sum is σ = 13904201376. Its totient is φ = 13785361584.

The previous prime is 13844781421. The next prime is 13844781523. The reversal of 13844781479 is 97418744831.

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

It is a cyclic number.

It is not a de Polignac number, because 13844781479 - 2¹² = 13844777383 is a prime.

It is a super-2 number, since 2×13844781479² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13844781179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29709599 + ... + 29710064.

It is an arithmetic number, because the mean of its divisors is an integer number (3476050344).

Almost surely, 2^13844781479 is an apocalyptic number.

13844781479 is a deficient number, since it is larger than the sum of its proper divisors (59419897).

13844781479 is an equidigital number, since it uses as much as digits as its factorization.

13844781479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59419896.

The product of its digits is 5419008, while the sum is 56.

The spelling of 13844781479 in words is "thirteen billion, eight hundred forty-four million, seven hundred eighty-one thousand, four hundred seventy-nine".