521480064 has 64 divisors (see below), whose sum is σ = 1583072640. Its totient is φ = 148993536.

The previous prime is 521480021. The next prime is 521480101. The reversal of 521480064 is 460084125.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94314 + ... + 99689.

It is an arithmetic number, because the mean of its divisors is an integer number (24735510).

Almost surely, 2^521480064 is an apocalyptic number.

It is an amenable number.

521480064 is an abundant number, since it is smaller than the sum of its proper divisors (1061592576).

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

521480064 is a wasteful number, since it uses less digits than its factorization.

521480064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194027 (or 194015 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 521480064 is about 22835.9379925590. The cubic root of 521480064 is about 804.9073689435.

The spelling of 521480064 in words is "five hundred twenty-one million, four hundred eighty thousand, sixty-four".