56520516517 has 4 divisors (see below), whose sum is σ = 56530457260. Its totient is φ = 56510575776.

The previous prime is 56520516491. The next prime is 56520516527. The reversal of 56520516517 is 71561502565.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39839760801 + 16680755716 = 199599^2 + 129154^2 .

It is a cyclic number.

It is not a de Polignac number, because 56520516517 - 2⁷ = 56520516389 is a prime.

It is a super-5 number, since 5×56520516517⁵ (a number of 55 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56520516527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4961838 + ... + 4973215.

It is an arithmetic number, because the mean of its divisors is an integer number (14132614315).

Almost surely, 2^56520516517 is an apocalyptic number.

It is an amenable number.

56520516517 is a deficient number, since it is larger than the sum of its proper divisors (9940743).

56520516517 is an equidigital number, since it uses as much as digits as its factorization.

56520516517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9940742.

The product of its (nonzero) digits is 315000, while the sum is 43.

The spelling of 56520516517 in words is "fifty-six billion, five hundred twenty million, five hundred sixteen thousand, five hundred seventeen".