13871026491 has 16 divisors (see below), whose sum is σ = 21149990400. Its totient is φ = 7921355328.

The previous prime is 13871026471. The next prime is 13871026531. The reversal of 13871026491 is 19462017831.

It is a happy number.

It is not a de Polignac number, because 13871026491 - 2⁷ = 13871026363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13871026451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171471 + ... + 239048.

It is an arithmetic number, because the mean of its divisors is an integer number (1321874400).

Almost surely, 2^13871026491 is an apocalyptic number.

13871026491 is a deficient number, since it is larger than the sum of its proper divisors (7278963909).

13871026491 is a wasteful number, since it uses less digits than its factorization.

13871026491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412138.

The product of its (nonzero) digits is 72576, while the sum is 42.

The spelling of 13871026491 in words is "thirteen billion, eight hundred seventy-one million, twenty-six thousand, four hundred ninety-one".