11313171891 has 36 divisors (see below), whose sum is σ = 19065864792. Its totient is φ = 6445401984.

The previous prime is 11313171887. The next prime is 11313171893. The reversal of 11313171891 is 19817131311.

It is not a de Polignac number, because 11313171891 - 2² = 11313171887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11313171893) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 110556 + ... + 186678.

Almost surely, 2^11313171891 is an apocalyptic number.

11313171891 is a deficient number, since it is larger than the sum of its proper divisors (7752692901).

11313171891 is a wasteful number, since it uses less digits than its factorization.

11313171891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76480 (or 76470 counting only the distinct ones).

The product of its digits is 4536, while the sum is 36.

The spelling of 11313171891 in words is "eleven billion, three hundred thirteen million, one hundred seventy-one thousand, eight hundred ninety-one".