42442106568689 has 2 divisors, whose sum is σ = 42442106568690. Its totient is φ = 42442106568688.

The previous prime is 42442106568661. The next prime is 42442106568707. The reversal of 42442106568689 is 98686560124424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32023058667664 + 10419047901025 = 5658892^2 + 3227855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42442106568689 is a prime.

It is a super-2 number, since 2×42442106568689² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42442106568619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21221053284344 + 21221053284345.

It is an arithmetic number, because the mean of its divisors is an integer number (21221053284345).

Almost surely, 2^{42442106568689} is an apocalyptic number.

It is an amenable number.

42442106568689 is a deficient number, since it is larger than the sum of its proper divisors (1).

42442106568689 is an equidigital number, since it uses as much as digits as its factorization.

42442106568689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 159252480, while the sum is 65.

The spelling of 42442106568689 in words is "forty-two trillion, four hundred forty-two billion, one hundred six million, five hundred sixty-eight thousand, six hundred eighty-nine".