12985976109 has 4 divisors (see below), whose sum is σ = 17314634816. Its totient is φ = 8657317404.

The previous prime is 12985976093. The next prime is 12985976117. The reversal of 12985976109 is 90167958921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12985976109 - 2⁴ = 12985976093 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 (12985776109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2164329349 + ... + 2164329354.

It is an arithmetic number, because the mean of its divisors is an integer number (4328658704).

Almost surely, 2^12985976109 is an apocalyptic number.

It is an amenable number.

12985976109 is a deficient number, since it is larger than the sum of its proper divisors (4328658707).

12985976109 is an equidigital number, since it uses as much as digits as its factorization.

12985976109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328658706.

The product of its (nonzero) digits is 2449440, while the sum is 57.

The spelling of 12985976109 in words is "twelve billion, nine hundred eighty-five million, nine hundred seventy-six thousand, one hundred nine".