517117781472 has 96 divisors (see below), whose sum is σ = 1398882496032. Its totient is φ = 167141136384.

The previous prime is 517117781417. The next prime is 517117781513. The reversal of 517117781472 is 274187711715.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 792298 + ... + 1289174.

It is an arithmetic number, because the mean of its divisors is an integer number (14571692667).

Almost surely, 2^517117781472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 517117781472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (699441248016).

517117781472 is an abundant number, since it is smaller than the sum of its proper divisors (881764714560).

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

517117781472 is a wasteful number, since it uses less digits than its factorization.

517117781472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497220 (or 497212 counting only the distinct ones).

The product of its digits is 768320, while the sum is 51.

The spelling of 517117781472 in words is "five hundred seventeen billion, one hundred seventeen million, seven hundred eighty-one thousand, four hundred seventy-two".