521854311056 has 80 divisors (see below), whose sum is σ = 1136571421440. Its totient is φ = 230310812160.

The previous prime is 521854311029. The next prime is 521854311059. The reversal of 521854311056 is 650113458125.

It is not an unprimeable number, because it can be changed into a prime (521854311059) 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 15 ways as a sum of consecutive naturals, for example, 16781090 + ... + 16812158.

It is an arithmetic number, because the mean of its divisors is an integer number (14207142768).

Almost surely, 2^521854311056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521854311056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (568285710720).

521854311056 is an abundant number, since it is smaller than the sum of its proper divisors (614717110384).

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

521854311056 is a wasteful number, since it uses less digits than its factorization.

521854311056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34624 (or 34618 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 41.

The spelling of 521854311056 in words is "five hundred twenty-one billion, eight hundred fifty-four million, three hundred eleven thousand, fifty-six".