521064680 has 16 divisors (see below), whose sum is σ = 1172395620. Its totient is φ = 208425856.

The previous prime is 521064667. The next prime is 521064707. The reversal of 521064680 is 86460125.

It can be written as a sum of positive squares in 2 ways, for example, as 505080676 + 15984004 = 22474^2 + 3998^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6513269 + ... + 6513348.

Almost surely, 2^521064680 is an apocalyptic number.

It is an amenable number.

521064680 is an abundant number, since it is smaller than the sum of its proper divisors (651330940).

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

521064680 is a wasteful number, since it uses less digits than its factorization.

521064680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13026628 (or 13026624 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 521064680 is about 22826.8412181800. The cubic root of 521064680 is about 804.6935963380.

The spelling of 521064680 in words is "five hundred twenty-one million, sixty-four thousand, six hundred eighty".