517005017172 has 72 divisors (see below), whose sum is σ = 1495016659136. Its totient is φ = 147572648064.

The previous prime is 517005017153. The next prime is 517005017173. The reversal of 517005017172 is 271710500715.

517005017172 is a `hidden beast` number, since 5 + 17 + 0 + 0 + 501 + 71 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517005017173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 732718 + ... + 1253349.

Almost surely, 2^517005017172 is an apocalyptic number.

It is an amenable number.

517005017172 is an abundant number, since it is smaller than the sum of its proper divisors (978011641964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

517005017172 is a wasteful number, since it uses less digits than its factorization.

517005017172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987117 (or 1987112 counting only the distinct ones).

The product of its (nonzero) digits is 17150, while the sum is 36.

Adding to 517005017172 its reverse (271710500715), we get a palindrome (788715517887).

The spelling of 517005017172 in words is "five hundred seventeen billion, five million, seventeen thousand, one hundred seventy-two".