513144543817 has 2 divisors, whose sum is σ = 513144543818. Its totient is φ = 513144543816.

The previous prime is 513144543803. The next prime is 513144543827. The reversal of 513144543817 is 718345441315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 468069432336 + 45075111481 = 684156^2 + 212309^2 .

It is a cyclic number.

It is not a de Polignac number, because 513144543817 - 2⁷ = 513144543689 is a prime.

It is not a weakly prime, because it can be changed into another prime (513144543827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256572271908 + 256572271909.

It is an arithmetic number, because the mean of its divisors is an integer number (256572271909).

Almost surely, 2^513144543817 is an apocalyptic number.

It is an amenable number.

513144543817 is a deficient number, since it is larger than the sum of its proper divisors (1).

513144543817 is an equidigital number, since it uses as much as digits as its factorization.

513144543817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 806400, while the sum is 46.

The spelling of 513144543817 in words is "five hundred thirteen billion, one hundred forty-four million, five hundred forty-three thousand, eight hundred seventeen".