12890111791 has 4 divisors (see below), whose sum is σ = 12902591152. Its totient is φ = 12877632432.

The previous prime is 12890111779. The next prime is 12890111833. The reversal of 12890111791 is 19711109821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12890111791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12890111711) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6238131 + ... + 6240196.

It is an arithmetic number, because the mean of its divisors is an integer number (3225647788).

Almost surely, 2^12890111791 is an apocalyptic number.

12890111791 is a deficient number, since it is larger than the sum of its proper divisors (12479361).

12890111791 is a wasteful number, since it uses less digits than its factorization.

12890111791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12479360.

The product of its (nonzero) digits is 9072, while the sum is 40.

The spelling of 12890111791 in words is "twelve billion, eight hundred ninety million, one hundred eleven thousand, seven hundred ninety-one".