520644072593 has 2 divisors, whose sum is σ = 520644072594. Its totient is φ = 520644072592.

The previous prime is 520644072581. The next prime is 520644072643. The reversal of 520644072593 is 395270446025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 520615642369 + 28430224 = 721537^2 + 5332^2 .

It is a cyclic number.

It is not a de Polignac number, because 520644072593 - 2²⁰ = 520643024017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (520644072293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260322036296 + 260322036297.

It is an arithmetic number, because the mean of its divisors is an integer number (260322036297).

Almost surely, 2^520644072593 is an apocalyptic number.

It is an amenable number.

520644072593 is a deficient number, since it is larger than the sum of its proper divisors (1).

520644072593 is an equidigital number, since it uses as much as digits as its factorization.

520644072593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 520644072593 in words is "five hundred twenty billion, six hundred forty-four million, seventy-two thousand, five hundred ninety-three".