520573505389 has 4 divisors (see below), whose sum is σ = 594941149024. Its totient is φ = 446205861756.

The previous prime is 520573505369. The next prime is 520573505401. The reversal of 520573505389 is 983505375025.

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 520573505389 - 2³⁵ = 486213767021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520573505369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37183821807 + ... + 37183821820.

It is an arithmetic number, because the mean of its divisors is an integer number (148735287256).

Almost surely, 2^520573505389 is an apocalyptic number.

It is an amenable number.

520573505389 is a deficient number, since it is larger than the sum of its proper divisors (74367643635).

520573505389 is an equidigital number, since it uses as much as digits as its factorization.

520573505389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74367643634.

The product of its (nonzero) digits is 5670000, while the sum is 52.

The spelling of 520573505389 in words is "five hundred twenty billion, five hundred seventy-three million, five hundred five thousand, three hundred eighty-nine".