12517817843 has 2 divisors, whose sum is σ = 12517817844. Its totient is φ = 12517817842.

The previous prime is 12517817833. The next prime is 12517817909. The reversal of 12517817843 is 34871871521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12517817843 - 2⁶ = 12517817779 is a prime.

It is not a weakly prime, because it can be changed into another prime (12517817813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6258908921 + 6258908922.

It is an arithmetic number, because the mean of its divisors is an integer number (6258908922).

Almost surely, 2^12517817843 is an apocalyptic number.

12517817843 is a deficient number, since it is larger than the sum of its proper divisors (1).

12517817843 is an equidigital number, since it uses as much as digits as its factorization.

12517817843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376320, while the sum is 47.

The spelling of 12517817843 in words is "twelve billion, five hundred seventeen million, eight hundred seventeen thousand, eight hundred forty-three".