245120305057 has 2 divisors, whose sum is σ = 245120305058. Its totient is φ = 245120305056.

The previous prime is 245120305037. The next prime is 245120305097. The reversal of 245120305057 is 750503021542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193304432896 + 51815872161 = 439664^2 + 227631^2 .

It is a cyclic number.

It is not a de Polignac number, because 245120305057 - 2⁷ = 245120304929 is a prime.

It is not a weakly prime, because it can be changed into another prime (245120305037) 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, 122560152528 + 122560152529.

It is an arithmetic number, because the mean of its divisors is an integer number (122560152529).

Almost surely, 2^245120305057 is an apocalyptic number.

It is an amenable number.

245120305057 is a deficient number, since it is larger than the sum of its proper divisors (1).

245120305057 is an equidigital number, since it uses as much as digits as its factorization.

245120305057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42000, while the sum is 34.

Adding to 245120305057 its reverse (750503021542), we get a palindrome (995623326599).

The spelling of 245120305057 in words is "two hundred forty-five billion, one hundred twenty million, three hundred five thousand, fifty-seven".