521795680 has 96 divisors (see below), whose sum is σ = 1417518144. Its totient is φ = 177801216.

The previous prime is 521795657. The next prime is 521795713. The reversal of 521795680 is 86597125.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192414 + ... + 195106.

It is an arithmetic number, because the mean of its divisors is an integer number (14765814).

Almost surely, 2^521795680 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 521795680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708759072).

521795680 is an abundant number, since it is smaller than the sum of its proper divisors (895722464).

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

521795680 is a wasteful number, since it uses less digits than its factorization.

521795680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888 (or 2880 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 521795680 is about 22842.8474582308. The cubic root of 521795680 is about 805.0697212094.

The spelling of 521795680 in words is "five hundred twenty-one million, seven hundred ninety-five thousand, six hundred eighty".