521545055330020 has 48 divisors (see below), whose sum is σ = 1110615730035840. Its totient is φ = 205692084170496.

The previous prime is 521545055329997. The next prime is 521545055330023. The reversal of 521545055330020 is 20033550545125.

It is a super-3 number, since 3×521545055330020³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (521545055330023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54754672 + ... + 63570151.

It is an arithmetic number, because the mean of its divisors is an integer number (23137827709080).

Almost surely, 2^{521545055330020} is an apocalyptic number.

It is an amenable number.

521545055330020 is an abundant number, since it is smaller than the sum of its proper divisors (589070674705820).

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

521545055330020 is a wasteful number, since it uses less digits than its factorization.

521545055330020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118327924 (or 118327922 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 40.

The spelling of 521545055330020 in words is "five hundred twenty-one trillion, five hundred forty-five billion, fifty-five million, three hundred thirty thousand, twenty".