520762447057 has 4 divisors (see below), whose sum is σ = 551395532196. Its totient is φ = 490129361920.

The previous prime is 520762447033. The next prime is 520762447067. The reversal of 520762447057 is 750744267025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 465507362961 + 55255084096 = 682281^2 + 235064^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520762447057 is a prime.

It is a super-2 number, since 2×520762447057² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 520762447057.

It is not an unprimeable number, because it can be changed into a prime (520762447067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15316542544 + ... + 15316542577.

It is an arithmetic number, because the mean of its divisors is an integer number (137848883049).

Almost surely, 2^520762447057 is an apocalyptic number.

It is an amenable number.

520762447057 is a deficient number, since it is larger than the sum of its proper divisors (30633085139).

520762447057 is a wasteful number, since it uses less digits than its factorization.

520762447057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30633085138.

The product of its (nonzero) digits is 3292800, while the sum is 49.

The spelling of 520762447057 in words is "five hundred twenty billion, seven hundred sixty-two million, four hundred forty-seven thousand, fifty-seven".