12558939787 has 4 divisors (see below), whose sum is σ = 12700051560. Its totient is φ = 12417828016.

The previous prime is 12558939769. The next prime is 12558939791. The reversal of 12558939787 is 78793985521.

12558939787 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78793985521 = 211 ⋅373431211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12558939787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12558939707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70555753 + ... + 70555930.

It is an arithmetic number, because the mean of its divisors is an integer number (3175012890).

Almost surely, 2^12558939787 is an apocalyptic number.

12558939787 is a deficient number, since it is larger than the sum of its proper divisors (141111773).

12558939787 is an equidigital number, since it uses as much as digits as its factorization.

12558939787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141111772.

The product of its digits is 38102400, while the sum is 64.

The spelling of 12558939787 in words is "twelve billion, five hundred fifty-eight million, nine hundred thirty-nine thousand, seven hundred eighty-seven".