12516042541 has 2 divisors, whose sum is σ = 12516042542. Its totient is φ = 12516042540.

The previous prime is 12516042533. The next prime is 12516042547. The reversal of 12516042541 is 14524061521.

It is a happy number.

12516042541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11803953316 + 712089225 = 108646^2 + 26685^2 .

It is a cyclic number.

It is not a de Polignac number, because 12516042541 - 2³ = 12516042533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12516042547) 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 as a sum of consecutive naturals, namely, 6258021270 + 6258021271.

It is an arithmetic number, because the mean of its divisors is an integer number (6258021271).

Almost surely, 2^12516042541 is an apocalyptic number.

It is an amenable number.

12516042541 is a deficient number, since it is larger than the sum of its proper divisors (1).

12516042541 is an equidigital number, since it uses as much as digits as its factorization.

12516042541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 31.

The spelling of 12516042541 in words is "twelve billion, five hundred sixteen million, forty-two thousand, five hundred forty-one".