520945644953 has 2 divisors, whose sum is σ = 520945644954. Its totient is φ = 520945644952.

The previous prime is 520945644847. The next prime is 520945644997. The reversal of 520945644953 is 359446549025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 462851630224 + 58094014729 = 680332^2 + 241027^2 .

It is a cyclic number.

It is not a de Polignac number, because 520945644953 - 2²² = 520941450649 is a prime.

It is not a weakly prime, because it can be changed into another prime (520945644553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260472822476 + 260472822477.

It is an arithmetic number, because the mean of its divisors is an integer number (260472822477).

Almost surely, 2^520945644953 is an apocalyptic number.

It is an amenable number.

520945644953 is a deficient number, since it is larger than the sum of its proper divisors (1).

520945644953 is an equidigital number, since it uses as much as digits as its factorization.

520945644953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328000, while the sum is 56.

The spelling of 520945644953 in words is "five hundred twenty billion, nine hundred forty-five million, six hundred forty-four thousand, nine hundred fifty-three".