495245981569 has 2 divisors, whose sum is σ = 495245981570. Its totient is φ = 495245981568.

The previous prime is 495245981561. The next prime is 495245981611. The reversal of 495245981569 is 965189542594.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 492366049344 + 2879932225 = 701688^2 + 53665^2 .

It is a cyclic number.

It is not a de Polignac number, because 495245981569 - 2³ = 495245981561 is a prime.

It is a super-2 number, since 2×495245981569² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (495245981561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247622990784 + 247622990785.

It is an arithmetic number, because the mean of its divisors is an integer number (247622990785).

Almost surely, 2^495245981569 is an apocalyptic number.

It is an amenable number.

495245981569 is a deficient number, since it is larger than the sum of its proper divisors (1).

495245981569 is an equidigital number, since it uses as much as digits as its factorization.

495245981569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968000, while the sum is 67.

The spelling of 495245981569 in words is "four hundred ninety-five billion, two hundred forty-five million, nine hundred eighty-one thousand, five hundred sixty-nine".