12555587679 has 4 divisors (see below), whose sum is σ = 16740783576. Its totient is φ = 8370391784.

The previous prime is 12555587669. The next prime is 12555587683. The reversal of 12555587679 is 97678555521.

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

It is a cyclic number.

It is not a de Polignac number, because 12555587679 - 2²¹ = 12553490527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12555587669) 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, 2092597944 + ... + 2092597949.

It is an arithmetic number, because the mean of its divisors is an integer number (4185195894).

Almost surely, 2^12555587679 is an apocalyptic number.

12555587679 is a deficient number, since it is larger than the sum of its proper divisors (4185195897).

12555587679 is an equidigital number, since it uses as much as digits as its factorization.

12555587679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4185195896.

The product of its digits is 26460000, while the sum is 60.

The spelling of 12555587679 in words is "twelve billion, five hundred fifty-five million, five hundred eighty-seven thousand, six hundred seventy-nine".