520086681539 has 4 divisors (see below), whose sum is σ = 520384386024. Its totient is φ = 519788977056.

The previous prime is 520086681493. The next prime is 520086681557. The reversal of 520086681539 is 935186680025.

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

It is a cyclic number.

It is not a de Polignac number, because 520086681539 - 2¹² = 520086677443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520086681739) 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, 148849622 + ... + 148853115.

It is an arithmetic number, because the mean of its divisors is an integer number (130096096506).

Almost surely, 2^520086681539 is an apocalyptic number.

520086681539 is a deficient number, since it is larger than the sum of its proper divisors (297704485).

520086681539 is a wasteful number, since it uses less digits than its factorization.

520086681539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297704484.

The product of its (nonzero) digits is 3110400, while the sum is 53.

The spelling of 520086681539 in words is "five hundred twenty billion, eighty-six million, six hundred eighty-one thousand, five hundred thirty-nine".