12989871586 has 4 divisors (see below), whose sum is σ = 19484807382. Its totient is φ = 6494935792.

The previous prime is 12989871577. The next prime is 12989871613. The reversal of 12989871586 is 68517898921.

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

It can be written as a sum of positive squares in only one way, i.e., 12206935225 + 782936361 = 110485^2 + 27981^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3247467895 + ... + 3247467898.

Almost surely, 2^12989871586 is an apocalyptic number.

12989871586 is a deficient number, since it is larger than the sum of its proper divisors (6494935796).

12989871586 is an equidigital number, since it uses as much as digits as its factorization.

12989871586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6494935795.

The product of its digits is 17418240, while the sum is 64.

The spelling of 12989871586 in words is "twelve billion, nine hundred eighty-nine million, eight hundred seventy-one thousand, five hundred eighty-six".