12545763817 has 2 divisors, whose sum is σ = 12545763818. Its totient is φ = 12545763816.

The previous prime is 12545763809. The next prime is 12545763827. The reversal of 12545763817 is 71836754521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7330613161 + 5215150656 = 85619^2 + 72216^2 .

It is a cyclic number.

It is not a de Polignac number, because 12545763817 - 2³ = 12545763809 is a prime.

It is not a weakly prime, because it can be changed into another prime (12545763827) 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, 6272881908 + 6272881909.

It is an arithmetic number, because the mean of its divisors is an integer number (6272881909).

Almost surely, 2^12545763817 is an apocalyptic number.

It is an amenable number.

12545763817 is a deficient number, since it is larger than the sum of its proper divisors (1).

12545763817 is an equidigital number, since it uses as much as digits as its factorization.

12545763817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1411200, while the sum is 49.

The spelling of 12545763817 in words is "twelve billion, five hundred forty-five million, seven hundred sixty-three thousand, eight hundred seventeen".