12615749687 has 2 divisors, whose sum is σ = 12615749688. Its totient is φ = 12615749686.

The previous prime is 12615749681. The next prime is 12615749719. The reversal of 12615749687 is 78694751621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12615749687 - 2³² = 8320782391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12615749681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6307874843 + 6307874844.

It is an arithmetic number, because the mean of its divisors is an integer number (6307874844).

Almost surely, 2^12615749687 is an apocalyptic number.

12615749687 is a deficient number, since it is larger than the sum of its proper divisors (1).

12615749687 is an equidigital number, since it uses as much as digits as its factorization.

12615749687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 56.

The spelling of 12615749687 in words is "twelve billion, six hundred fifteen million, seven hundred forty-nine thousand, six hundred eighty-seven".