245323352205521 has 2 divisors, whose sum is σ = 245323352205522. Its totient is φ = 245323352205520.

The previous prime is 245323352205469. The next prime is 245323352205563. The reversal of 245323352205521 is 125502253323542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165200534417296 + 80122817788225 = 12853036^2 + 8951135^2 .

It is a cyclic number.

It is not a de Polignac number, because 245323352205521 - 2²⁶ = 245323285096657 is a prime.

It is not a weakly prime, because it can be changed into another prime (245323352205571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122661676102760 + 122661676102761.

It is an arithmetic number, because the mean of its divisors is an integer number (122661676102761).

Almost surely, 2^{245323352205521} is an apocalyptic number.

It is an amenable number.

245323352205521 is a deficient number, since it is larger than the sum of its proper divisors (1).

245323352205521 is an equidigital number, since it uses as much as digits as its factorization.

245323352205521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160000, while the sum is 44.

The spelling of 245323352205521 in words is "two hundred forty-five trillion, three hundred twenty-three billion, three hundred fifty-two million, two hundred five thousand, five hundred twenty-one".