520525909525001 has 2 divisors, whose sum is σ = 520525909525002. Its totient is φ = 520525909525000.

The previous prime is 520525909524967. The next prime is 520525909525091. The reversal of 520525909525001 is 100525909525025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 307410437199376 + 213115472325625 = 17533124^2 + 14598475^2 .

It is a cyclic number.

It is not a de Polignac number, because 520525909525001 - 2⁶ = 520525909524937 is a prime.

It is not a weakly prime, because it can be changed into another prime (520525909525091) 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 as a sum of consecutive naturals, namely, 260262954762500 + 260262954762501.

It is an arithmetic number, because the mean of its divisors is an integer number (260262954762501).

Almost surely, 2^{520525909525001} is an apocalyptic number.

It is an amenable number.

520525909525001 is a deficient number, since it is larger than the sum of its proper divisors (1).

520525909525001 is an equidigital number, since it uses as much as digits as its factorization.

520525909525001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2025000, while the sum is 50.

The spelling of 520525909525001 in words is "five hundred twenty trillion, five hundred twenty-five billion, nine hundred nine million, five hundred twenty-five thousand, one".