13815421168 has 20 divisors (see below), whose sum is σ = 26907527808. Its totient is φ = 6871543040.

The previous prime is 13815421153. The next prime is 13815421177. The reversal of 13815421168 is 86112451831.

It is a self number, because there is not a number n which added to its sum of digits gives 13815421168.

It is a congruent number.

It is an unprimeable number.

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, 2257321 + ... + 2263432.

Almost surely, 2^13815421168 is an apocalyptic number.

It is an amenable number.

13815421168 is a deficient number, since it is larger than the sum of its proper divisors (13092106640).

13815421168 is a wasteful number, since it uses less digits than its factorization.

13815421168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4520952 (or 4520946 counting only the distinct ones).

The product of its digits is 46080, while the sum is 40.

Adding to 13815421168 its reverse (86112451831), we get a palindrome (99927872999).

The spelling of 13815421168 in words is "thirteen billion, eight hundred fifteen million, four hundred twenty-one thousand, one hundred sixty-eight".