12505662017899 has 2 divisors, whose sum is σ = 12505662017900. Its totient is φ = 12505662017898.

The previous prime is 12505662017819. The next prime is 12505662017929. The reversal of 12505662017899 is 99871026650521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12505662017899 - 2⁴¹ = 10306638762347 is a prime.

It is not a weakly prime, because it can be changed into another prime (12505662017819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6252831008949 + 6252831008950.

It is an arithmetic number, because the mean of its divisors is an integer number (6252831008950).

Almost surely, 2^{12505662017899} is an apocalyptic number.

12505662017899 is a deficient number, since it is larger than the sum of its proper divisors (1).

12505662017899 is an equidigital number, since it uses as much as digits as its factorization.

12505662017899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16329600, while the sum is 61.

The spelling of 12505662017899 in words is "twelve trillion, five hundred five billion, six hundred sixty-two million, seventeen thousand, eight hundred ninety-nine".