520800168137 has 4 divisors (see below), whose sum is σ = 525667459536. Its totient is φ = 515932876740.

The previous prime is 520800168071. The next prime is 520800168139. The reversal of 520800168137 is 731861008025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520800168137 - 2¹² = 520800164041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520800168094 and 520800168103.

It is not an unprimeable number, because it can be changed into a prime (520800168139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2433645539 + ... + 2433645752.

It is an arithmetic number, because the mean of its divisors is an integer number (131416864884).

Almost surely, 2^520800168137 is an apocalyptic number.

It is an amenable number.

520800168137 is a deficient number, since it is larger than the sum of its proper divisors (4867291399).

520800168137 is a wasteful number, since it uses less digits than its factorization.

520800168137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4867291398.

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 520800168137 in words is "five hundred twenty billion, eight hundred million, one hundred sixty-eight thousand, one hundred thirty-seven".