245265408161 has 2 divisors, whose sum is σ = 245265408162. Its totient is φ = 245265408160.

The previous prime is 245265408151. The next prime is 245265408173. The reversal of 245265408161 is 161804562542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126340437136 + 118924971025 = 355444^2 + 344855^2 .

It is a cyclic number.

It is not a de Polignac number, because 245265408161 - 2⁶ = 245265408097 is a prime.

It is not a weakly prime, because it can be changed into another prime (245265408151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122632704080 + 122632704081.

It is an arithmetic number, because the mean of its divisors is an integer number (122632704081).

Almost surely, 2^245265408161 is an apocalyptic number.

It is an amenable number.

245265408161 is a deficient number, since it is larger than the sum of its proper divisors (1).

245265408161 is an equidigital number, since it uses as much as digits as its factorization.

245265408161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 245265408161 in words is "two hundred forty-five billion, two hundred sixty-five million, four hundred eight thousand, one hundred sixty-one".