505404521568 has 96 divisors (see below), whose sum is σ = 1513937063520. Its totient is φ = 163914969600.

The previous prime is 505404521561. The next prime is 505404521569. The reversal of 505404521568 is 865125404505.

505404521568 is a `hidden beast` number, since 5 + 0 + 5 + 40 + 45 + 2 + 1 + 568 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505404521561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7872883 + ... + 7936818.

It is an arithmetic number, because the mean of its divisors is an integer number (15770177745).

Almost surely, 2^505404521568 is an apocalyptic number.

It is an amenable number.

505404521568 is an abundant number, since it is smaller than the sum of its proper divisors (1008532541952).

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

505404521568 is a wasteful number, since it uses less digits than its factorization.

505404521568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15809757 (or 15809743 counting only the distinct ones).

The product of its (nonzero) digits is 960000, while the sum is 45.

The spelling of 505404521568 in words is "five hundred five billion, four hundred four million, five hundred twenty-one thousand, five hundred sixty-eight".