521880493992 has 256 divisors, whose sum is σ = 1585601740800. Its totient is φ = 141008532480.

The previous prime is 521880493909. The next prime is 521880494011. The reversal of 521880493992 is 299394088125.

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 63 ways as a sum of consecutive naturals, for example, 17635993 + ... + 17665559.

It is an arithmetic number, because the mean of its divisors is an integer number (6193756800).

Almost surely, 2^521880493992 is an apocalyptic number.

521880493992 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521880493992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (792800870400).

521880493992 is an abundant number, since it is smaller than the sum of its proper divisors (1063721246808).

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

521880493992 is a wasteful number, since it uses less digits than its factorization.

521880493992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29776 (or 29772 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 60.

The spelling of 521880493992 in words is "five hundred twenty-one billion, eight hundred eighty million, four hundred ninety-three thousand, nine hundred ninety-two".