42443855017 has 2 divisors, whose sum is σ = 42443855018. Its totient is φ = 42443855016.

The previous prime is 42443854987. The next prime is 42443855063. The reversal of 42443855017 is 71055834424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40151743641 + 2292111376 = 200379^2 + 47876^2 .

It is a cyclic number.

It is not a de Polignac number, because 42443855017 - 2²⁷ = 42309637289 is a prime.

It is not a weakly prime, because it can be changed into another prime (42443855317) 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, 21221927508 + 21221927509.

It is an arithmetic number, because the mean of its divisors is an integer number (21221927509).

Almost surely, 2^42443855017 is an apocalyptic number.

It is an amenable number.

42443855017 is a deficient number, since it is larger than the sum of its proper divisors (1).

42443855017 is an equidigital number, since it uses as much as digits as its factorization.

42443855017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 537600, while the sum is 43.

The spelling of 42443855017 in words is "forty-two billion, four hundred forty-three million, eight hundred fifty-five thousand, seventeen".