565540146881 has 2 divisors, whose sum is σ = 565540146882. Its totient is φ = 565540146880.

The previous prime is 565540146859. The next prime is 565540146907. The reversal of 565540146881 is 188641045565.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 433742105281 + 131798041600 = 658591^2 + 363040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-565540146881 is a prime.

It is a super-2 number, since 2×565540146881² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (565540146841) 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, 282770073440 + 282770073441.

It is an arithmetic number, because the mean of its divisors is an integer number (282770073441).

Almost surely, 2^565540146881 is an apocalyptic number.

It is an amenable number.

565540146881 is a deficient number, since it is larger than the sum of its proper divisors (1).

565540146881 is an equidigital number, since it uses as much as digits as its factorization.

565540146881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608000, while the sum is 53.

The spelling of 565540146881 in words is "five hundred sixty-five billion, five hundred forty million, one hundred forty-six thousand, eight hundred eighty-one".