517671943509 has 12 divisors (see below), whose sum is σ = 802919749344. Its totient is φ = 295812539064.

The previous prime is 517671943489. The next prime is 517671943519. The reversal of 517671943509 is 905349176715.

It is not a de Polignac number, because 517671943509 - 2²¹ = 517669846357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517671943519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1760788777 + ... + 1760789070.

It is an arithmetic number, because the mean of its divisors is an integer number (66909979112).

Almost surely, 2^517671943509 is an apocalyptic number.

It is an amenable number.

517671943509 is a deficient number, since it is larger than the sum of its proper divisors (285247805835).

517671943509 is a wasteful number, since it uses less digits than its factorization.

517671943509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521577864 (or 3521577857 counting only the distinct ones).

The product of its (nonzero) digits is 7144200, while the sum is 57.

The spelling of 517671943509 in words is "five hundred seventeen billion, six hundred seventy-one million, nine hundred forty-three thousand, five hundred nine".