521936320512 has 384 divisors, whose sum is σ = 1472407372800. Its totient is φ = 164247502848.

The previous prime is 521936320487. The next prime is 521936320513. The reversal of 521936320512 is 215023639125.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-3 number, since 3×521936320512³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521936320513) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1025414914 + ... + 1025415422.

It is an arithmetic number, because the mean of its divisors is an integer number (3834394200).

Almost surely, 2^521936320512 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 521936320512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (736203686400).

521936320512 is an abundant number, since it is smaller than the sum of its proper divisors (950471052288).

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

521936320512 is a wasteful number, since it uses less digits than its factorization.

521936320512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

Adding to 521936320512 its reverse (215023639125), we get a palindrome (736959959637).

The spelling of 521936320512 in words is "five hundred twenty-one billion, nine hundred thirty-six million, three hundred twenty thousand, five hundred twelve".