13481856817278 has 32 divisors (see below), whose sum is σ = 27055798398720. Its totient is φ = 4478629995840.

The previous prime is 13481856817259. The next prime is 13481856817321. The reversal of 13481856817278 is 87271865818431.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1005663 + ... + 5289146.

It is an arithmetic number, because the mean of its divisors is an integer number (845493699960).

Almost surely, 2^{13481856817278} is an apocalyptic number.

13481856817278 is an abundant number, since it is smaller than the sum of its proper divisors (13573941581442).

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

13481856817278 is a wasteful number, since it uses less digits than its factorization.

13481856817278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6296032.

The product of its digits is 144506880, while the sum is 69.

The spelling of 13481856817278 in words is "thirteen trillion, four hundred eighty-one billion, eight hundred fifty-six million, eight hundred seventeen thousand, two hundred seventy-eight".