518522020425 has 72 divisors (see below), whose sum is σ = 964737315360. Its totient is φ = 276082992000.

The previous prime is 518522020421. The next prime is 518522020447. The reversal of 518522020425 is 524020225815.

518522020425 is a `hidden beast` number, since 5 + 1 + 8 + 5 + 220 + 2 + 0 + 425 = 666.

It is not a de Polignac number, because 518522020425 - 2² = 518522020421 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 518522020425.

It is not an unprimeable number, because it can be changed into a prime (518522020421) 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 71 ways as a sum of consecutive naturals, for example, 3580066 + ... + 3722084.

It is an arithmetic number, because the mean of its divisors is an integer number (13399129380).

Almost surely, 2^518522020425 is an apocalyptic number.

It is an amenable number.

518522020425 is a deficient number, since it is larger than the sum of its proper divisors (446215294935).

518522020425 is a wasteful number, since it uses less digits than its factorization.

518522020425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142645 (or 142628 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 36.

The spelling of 518522020425 in words is "five hundred eighteen billion, five hundred twenty-two million, twenty thousand, four hundred twenty-five".