12982311891 has 12 divisors (see below), whose sum is σ = 18769399168. Its totient is φ = 8646949584.

The previous prime is 12982311877. The next prime is 12982311913. The reversal of 12982311891 is 19811328921.

It is not a de Polignac number, because 12982311891 - 2¹⁷ = 12982180819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12982311491) 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 11 ways as a sum of consecutive naturals, for example, 650035 + ... + 669708.

Almost surely, 2^12982311891 is an apocalyptic number.

12982311891 is a deficient number, since it is larger than the sum of its proper divisors (5787087277).

12982311891 is a wasteful number, since it uses less digits than its factorization.

12982311891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320842 (or 1320839 counting only the distinct ones).

The product of its digits is 62208, while the sum is 45.

The spelling of 12982311891 in words is "twelve billion, nine hundred eighty-two million, three hundred eleven thousand, eight hundred ninety-one".