13881124645 has 8 divisors (see below), whose sum is σ = 16682862456. Its totient is φ = 11087891136.

The previous prime is 13881124639. The next prime is 13881124651. The reversal of 13881124645 is 54642118831.

13881124645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13881124639) and next prime (13881124651).

It can be written as a sum of positive squares in 4 ways, for example, as 3329520804 + 10551603841 = 57702^2 + 102721^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13881124645 - 2⁵ = 13881124613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2122482 + ... + 2129011.

It is an arithmetic number, because the mean of its divisors is an integer number (2085357807).

Almost surely, 2^13881124645 is an apocalyptic number.

It is an amenable number.

13881124645 is a deficient number, since it is larger than the sum of its proper divisors (2801737811).

13881124645 is an equidigital number, since it uses as much as digits as its factorization.

13881124645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252151.

The product of its digits is 184320, while the sum is 43.

The spelling of 13881124645 in words is "thirteen billion, eight hundred eighty-one million, one hundred twenty-four thousand, six hundred forty-five".