518980505 has 16 divisors (see below), whose sum is σ = 671858064. Its totient is φ = 383385600.

The previous prime is 518980499. The next prime is 518980513. The reversal of 518980505 is 505089815.

It can be written as a sum of positive squares in 8 ways, for example, as 9665881 + 509314624 = 3109^2 + 22568^2 .

It is a de Polignac number, because none of the positive numbers 2^k-518980505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 53096 + ... + 62105.

It is an arithmetic number, because the mean of its divisors is an integer number (41991129).

Almost surely, 2^518980505 is an apocalyptic number.

It is an amenable number.

518980505 is a deficient number, since it is larger than the sum of its proper divisors (152877559).

518980505 is a wasteful number, since it uses less digits than its factorization.

518980505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115276.

The product of its (nonzero) digits is 72000, while the sum is 41.

The square root of 518980505 is about 22781.1436280095. The cubic root of 518980505 is about 803.6192810013.

The spelling of 518980505 in words is "five hundred eighteen million, nine hundred eighty thousand, five hundred five".