13551381318 has 32 divisors (see below), whose sum is σ = 27296961120. Its totient is φ = 4484874240.

The previous prime is 13551381301. The next prime is 13551381359. The reversal of 13551381318 is 81318315531.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 473398 + ... + 501206.

It is an arithmetic number, because the mean of its divisors is an integer number (853030035).

Almost surely, 2^13551381318 is an apocalyptic number.

13551381318 is an abundant number, since it is smaller than the sum of its proper divisors (13745579802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13551381318 is a wasteful number, since it uses less digits than its factorization.

13551381318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28392.

The product of its digits is 43200, while the sum is 39.

Adding to 13551381318 its reverse (81318315531), we get a palindrome (94869696849).

The spelling of 13551381318 in words is "thirteen billion, five hundred fifty-one million, three hundred eighty-one thousand, three hundred eighteen".