12509888887 has 2 divisors, whose sum is σ = 12509888888. Its totient is φ = 12509888886.

The previous prime is 12509888869. The next prime is 12509888927. The reversal of 12509888887 is 78888890521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12509888887 - 2⁷ = 12509888759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12509888387) 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 as a sum of consecutive naturals, namely, 6254944443 + 6254944444.

It is an arithmetic number, because the mean of its divisors is an integer number (6254944444).

Almost surely, 2^12509888887 is an apocalyptic number.

12509888887 is a deficient number, since it is larger than the sum of its proper divisors (1).

12509888887 is an equidigital number, since it uses as much as digits as its factorization.

12509888887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20643840, while the sum is 64.

The spelling of 12509888887 in words is "twelve billion, five hundred nine million, eight hundred eighty-eight thousand, eight hundred eighty-seven".