517849160989 has 2 divisors, whose sum is σ = 517849160990. Its totient is φ = 517849160988.

The previous prime is 517849160963. The next prime is 517849161029. The reversal of 517849160989 is 989061948715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 416141108100 + 101708052889 = 645090^2 + 318917^2 .

It is a cyclic number.

It is not a de Polignac number, because 517849160989 - 2¹³ = 517849152797 is a prime.

It is a super-2 number, since 2×517849160989² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (517849160929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 258924580494 + 258924580495.

It is an arithmetic number, because the mean of its divisors is an integer number (258924580495).

Almost surely, 2^517849160989 is an apocalyptic number.

It is an amenable number.

517849160989 is a deficient number, since it is larger than the sum of its proper divisors (1).

517849160989 is an equidigital number, since it uses as much as digits as its factorization.

517849160989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39191040, while the sum is 67.

The spelling of 517849160989 in words is "five hundred seventeen billion, eight hundred forty-nine million, one hundred sixty thousand, nine hundred eighty-nine".