245122505689 has 2 divisors, whose sum is σ = 245122505690. Its totient is φ = 245122505688.

The previous prime is 245122505653. The next prime is 245122505707. The reversal of 245122505689 is 986505221542.

245122505689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243509680089 + 1612825600 = 493467^2 + 40160^2 .

It is a cyclic number.

It is not a de Polignac number, because 245122505689 - 2³³ = 236532571097 is a prime.

It is not a weakly prime, because it can be changed into another prime (245122505189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122561252844 + 122561252845.

It is an arithmetic number, because the mean of its divisors is an integer number (122561252845).

Almost surely, 2^245122505689 is an apocalyptic number.

It is an amenable number.

245122505689 is a deficient number, since it is larger than the sum of its proper divisors (1).

245122505689 is an equidigital number, since it uses as much as digits as its factorization.

245122505689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728000, while the sum is 49.

The spelling of 245122505689 in words is "two hundred forty-five billion, one hundred twenty-two million, five hundred five thousand, six hundred eighty-nine".