13821071457 has 4 divisors (see below), whose sum is σ = 18428095280. Its totient is φ = 9214047636.

The previous prime is 13821071441. The next prime is 13821071461. The reversal of 13821071457 is 75417012831.

It is a happy number.

13821071457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13821071457 - 2⁴ = 13821071441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13821070457) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2303511907 + ... + 2303511912.

It is an arithmetic number, because the mean of its divisors is an integer number (4607023820).

Almost surely, 2^13821071457 is an apocalyptic number.

It is an amenable number.

13821071457 is a deficient number, since it is larger than the sum of its proper divisors (4607023823).

13821071457 is an equidigital number, since it uses as much as digits as its factorization.

13821071457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4607023822.

The product of its (nonzero) digits is 47040, while the sum is 39.

The spelling of 13821071457 in words is "thirteen billion, eight hundred twenty-one million, seventy-one thousand, four hundred fifty-seven".