520424135808 has 64 divisors (see below), whose sum is σ = 1419738179520. Its totient is φ = 168786201600.

The previous prime is 520424135779. The next prime is 520424135849. The reversal of 520424135808 is 808531424025.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×520424135808² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 520424135808.

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 7 ways as a sum of consecutive naturals, for example, 18300268 + ... + 18328683.

It is an arithmetic number, because the mean of its divisors is an integer number (22183409055).

Almost surely, 2^520424135808 is an apocalyptic number.

It is an amenable number.

520424135808 is an abundant number, since it is smaller than the sum of its proper divisors (899314043712).

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

520424135808 is a wasteful number, since it uses less digits than its factorization.

520424135808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36629005 (or 36628993 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 42.

The spelling of 520424135808 in words is "five hundred twenty billion, four hundred twenty-four million, one hundred thirty-five thousand, eight hundred eight".