520043345557 has 2 divisors, whose sum is σ = 520043345558. Its totient is φ = 520043345556.

The previous prime is 520043345533. The next prime is 520043345621. The reversal of 520043345557 is 755543340025.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 351685766961 + 168357578596 = 593031^2 + 410314^2 .

It is a cyclic number.

It is not a de Polignac number, because 520043345557 - 2¹⁹ = 520042821269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520043345257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260021672778 + 260021672779.

It is an arithmetic number, because the mean of its divisors is an integer number (260021672779).

Almost surely, 2^520043345557 is an apocalyptic number.

It is an amenable number.

520043345557 is a deficient number, since it is larger than the sum of its proper divisors (1).

520043345557 is an equidigital number, since it uses as much as digits as its factorization.

520043345557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260000, while the sum is 43.

The spelling of 520043345557 in words is "five hundred twenty billion, forty-three million, three hundred forty-five thousand, five hundred fifty-seven".