517116350371861 has 4 divisors (see below), whose sum is σ = 517367012686272. Its totient is φ = 516865688057452.

The previous prime is 517116350371729. The next prime is 517116350371889. The reversal of 517116350371861 is 168173053611715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 517116350371861 - 2²¹ = 517116348274709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517116350378861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125331154111 + ... + 125331158236.

It is an arithmetic number, because the mean of its divisors is an integer number (129341753171568).

Almost surely, 2^{517116350371861} is an apocalyptic number.

It is an amenable number.

517116350371861 is a deficient number, since it is larger than the sum of its proper divisors (250662314411).

517116350371861 is a wasteful number, since it uses less digits than its factorization.

517116350371861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250662314410.

The product of its (nonzero) digits is 3175200, while the sum is 55.

The spelling of 517116350371861 in words is "five hundred seventeen trillion, one hundred sixteen billion, three hundred fifty million, three hundred seventy-one thousand, eight hundred sixty-one".