518519636985 has 32 divisors (see below), whose sum is σ = 950587672320. Its totient is φ = 236428178688.

The previous prime is 518519636983. The next prime is 518519637001. The reversal of 518519636985 is 589636915815.

It is not a de Polignac number, because 518519636985 - 2¹ = 518519636983 is a prime.

It is a super-2 number, since 2×518519636985² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (518519636983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6306562 + ... + 6388251.

It is an arithmetic number, because the mean of its divisors is an integer number (29705864760).

Almost surely, 2^518519636985 is an apocalyptic number.

It is an amenable number.

518519636985 is a deficient number, since it is larger than the sum of its proper divisors (432068035335).

518519636985 is a wasteful number, since it uses less digits than its factorization.

518519636985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12695217.

The product of its digits is 69984000, while the sum is 66.

The spelling of 518519636985 in words is "five hundred eighteen billion, five hundred nineteen million, six hundred thirty-six thousand, nine hundred eighty-five".