517689974648 has 128 divisors (see below), whose sum is σ = 1241215557120. Its totient is φ = 196547420160.

The previous prime is 517689974537. The next prime is 517689974653. The reversal of 517689974648 is 846479986715.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11446736 + ... + 11491872.

It is an arithmetic number, because the mean of its divisors is an integer number (9696996540).

Almost surely, 2^517689974648 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 517689974648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (620607778560).

517689974648 is an abundant number, since it is smaller than the sum of its proper divisors (723525582472).

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

517689974648 is a wasteful number, since it uses less digits than its factorization.

517689974648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45637 (or 45633 counting only the distinct ones).

The product of its digits is 731566080, while the sum is 74.

The spelling of 517689974648 in words is "five hundred seventeen billion, six hundred eighty-nine million, nine hundred seventy-four thousand, six hundred forty-eight".