520505616 has 40 divisors (see below), whose sum is σ = 1360850400. Its totient is φ = 171410176.

The previous prime is 520505581. The next prime is 520505651. The reversal of 520505616 is 616505025.

It is an interprime number because it is at equal distance from previous prime (520505581) and next prime (520505651).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61341 + ... + 69308.

It is an arithmetic number, because the mean of its divisors is an integer number (34021260).

Almost surely, 2^520505616 is an apocalyptic number.

It is an amenable number.

520505616 is an abundant number, since it is smaller than the sum of its proper divisors (840344784).

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

520505616 is a wasteful number, since it uses less digits than its factorization.

520505616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130743 (or 130737 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 520505616 is about 22814.5921725548. The cubic root of 520505616 is about 804.4057010419.

The spelling of 520505616 in words is "five hundred twenty million, five hundred five thousand, six hundred sixteen".