520256731213066 has 8 divisors (see below), whose sum is σ = 780392570868900. Its totient is φ = 260125874256768.

The previous prime is 520256731213049. The next prime is 520256731213123. The reversal of 520256731213066 is 660312137652025.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 510092207618841 + 10164523594225 = 22585221^2 + 3188185^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1245413841 + ... + 1245831508.

Almost surely, 2^{520256731213066} is an apocalyptic number.

520256731213066 is a deficient number, since it is larger than the sum of its proper divisors (260135839655834).

520256731213066 is a wasteful number, since it uses less digits than its factorization.

520256731213066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491349768.

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 520256731213066 in words is "five hundred twenty trillion, two hundred fifty-six billion, seven hundred thirty-one million, two hundred thirteen thousand, sixty-six".