13181934490287 has 4 divisors (see below), whose sum is σ = 17575912653720. Its totient is φ = 8787956326856.

The previous prime is 13181934490271. The next prime is 13181934490313. The reversal of 13181934490287 is 78209443918131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13181934490287 - 2⁴ = 13181934490271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13181934490287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13181934490237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2196989081712 + ... + 2196989081717.

It is an arithmetic number, because the mean of its divisors is an integer number (4393978163430).

Almost surely, 2^{13181934490287} is an apocalyptic number.

13181934490287 is a deficient number, since it is larger than the sum of its proper divisors (4393978163433).

13181934490287 is an equidigital number, since it uses as much as digits as its factorization.

13181934490287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4393978163432.

The product of its (nonzero) digits is 10450944, while the sum is 60.

The spelling of 13181934490287 in words is "thirteen trillion, one hundred eighty-one billion, nine hundred thirty-four million, four hundred ninety thousand, two hundred eighty-seven".