513366630161081 has 2 divisors, whose sum is σ = 513366630161082. Its totient is φ = 513366630161080.

The previous prime is 513366630161071. The next prime is 513366630161159. The reversal of 513366630161081 is 180161036663315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 475668073953856 + 37698556207225 = 21809816^2 + 6139915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513366630161081 is a prime.

It is a super-2 number, since 2×513366630161081² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (513366630161051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256683315080540 + 256683315080541.

It is an arithmetic number, because the mean of its divisors is an integer number (256683315080541).

Almost surely, 2^{513366630161081} is an apocalyptic number.

It is an amenable number.

513366630161081 is a deficient number, since it is larger than the sum of its proper divisors (1).

513366630161081 is an equidigital number, since it uses as much as digits as its factorization.

513366630161081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 513366630161081 in words is "five hundred thirteen trillion, three hundred sixty-six billion, six hundred thirty million, one hundred sixty-one thousand, eighty-one".