12547987499 has 2 divisors, whose sum is σ = 12547987500. Its totient is φ = 12547987498.

The previous prime is 12547987411. The next prime is 12547987513. The reversal of 12547987499 is 99478974521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12547987499 - 2¹² = 12547983403 is a prime.

It is not a weakly prime, because it can be changed into another prime (12547983499) 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, 6273993749 + 6273993750.

It is an arithmetic number, because the mean of its divisors is an integer number (6273993750).

Almost surely, 2^12547987499 is an apocalyptic number.

12547987499 is a deficient number, since it is larger than the sum of its proper divisors (1).

12547987499 is an equidigital number, since it uses as much as digits as its factorization.

12547987499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45722880, while the sum is 65.

The spelling of 12547987499 in words is "twelve billion, five hundred forty-seven million, nine hundred eighty-seven thousand, four hundred ninety-nine".