517085053851 has 4 divisors (see below), whose sum is σ = 689446738472. Its totient is φ = 344723369232.

The previous prime is 517085053829. The next prime is 517085053889. The reversal of 517085053851 is 158350580715.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 517085053851 - 2¹⁴ = 517085037467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 517085053851.

It is not an unprimeable number, because it can be changed into a prime (517085053151) 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, 86180842306 + ... + 86180842311.

It is an arithmetic number, because the mean of its divisors is an integer number (172361684618).

Almost surely, 2^517085053851 is an apocalyptic number.

517085053851 is a deficient number, since it is larger than the sum of its proper divisors (172361684621).

517085053851 is a wasteful number, since it uses less digits than its factorization.

517085053851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172361684620.

The product of its (nonzero) digits is 840000, while the sum is 48.

The spelling of 517085053851 in words is "five hundred seventeen billion, eighty-five million, fifty-three thousand, eight hundred fifty-one".