517890505056 has 24 divisors (see below), whose sum is σ = 1359462576024. Its totient is φ = 172630168320.

The previous prime is 517890505051. The next prime is 517890505061. The reversal of 517890505056 is 650505098715.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (517890505051) and next prime (517890505061).

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (517890505051) 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, 2697346285 + ... + 2697346476.

It is an arithmetic number, because the mean of its divisors is an integer number (56644274001).

Almost surely, 2^517890505056 is an apocalyptic number.

It is an amenable number.

517890505056 is an abundant number, since it is smaller than the sum of its proper divisors (841572070968).

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

517890505056 is a wasteful number, since it uses less digits than its factorization.

517890505056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5394692774 (or 5394692766 counting only the distinct ones).

The product of its (nonzero) digits is 1890000, while the sum is 51.

The spelling of 517890505056 in words is "five hundred seventeen billion, eight hundred ninety million, five hundred five thousand, fifty-six".