505225166489 has 2 divisors, whose sum is σ = 505225166490. Its totient is φ = 505225166488.

The previous prime is 505225166419. The next prime is 505225166521. The reversal of 505225166489 is 984661522505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430440966400 + 74784200089 = 656080^2 + 273467^2 .

It is a cyclic number.

It is not a de Polignac number, because 505225166489 - 2⁸ = 505225166233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505225166489.

It is not a weakly prime, because it can be changed into another prime (505225166419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252612583244 + 252612583245.

It is an arithmetic number, because the mean of its divisors is an integer number (252612583245).

Almost surely, 2^505225166489 is an apocalyptic number.

It is an amenable number.

505225166489 is a deficient number, since it is larger than the sum of its proper divisors (1).

505225166489 is an equidigital number, since it uses as much as digits as its factorization.

505225166489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184000, while the sum is 53.

The spelling of 505225166489 in words is "five hundred five billion, two hundred twenty-five million, one hundred sixty-six thousand, four hundred eighty-nine".