520577276389 has 4 divisors (see below), whose sum is σ = 520584618924. Its totient is φ = 520569933856.

The previous prime is 520577276357. The next prime is 520577276407. The reversal of 520577276389 is 983672775025.

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 499047583489 + 21529692900 = 706433^2 + 146730^2 .

It is a cyclic number.

It is not a de Polignac number, because 520577276389 - 2⁵ = 520577276357 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 (520577246389) 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, 3563872 + ... + 3707065.

It is an arithmetic number, because the mean of its divisors is an integer number (130146154731).

Almost surely, 2^520577276389 is an apocalyptic number.

It is an amenable number.

520577276389 is a deficient number, since it is larger than the sum of its proper divisors (7342535).

520577276389 is an equidigital number, since it uses as much as digits as its factorization.

520577276389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7342534.

The product of its (nonzero) digits is 44452800, while the sum is 61.

The spelling of 520577276389 in words is "five hundred twenty billion, five hundred seventy-seven million, two hundred seventy-six thousand, three hundred eighty-nine".