42242953717 has 2 divisors, whose sum is σ = 42242953718. Its totient is φ = 42242953716.

The previous prime is 42242953691. The next prime is 42242953723. The reversal of 42242953717 is 71735924224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41841111601 + 401842116 = 204551^2 + 20046^2 .

It is a cyclic number.

It is not a de Polignac number, because 42242953717 - 2¹⁹ = 42242429429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42242951717) 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, 21121476858 + 21121476859.

It is an arithmetic number, because the mean of its divisors is an integer number (21121476859).

Almost surely, 2^42242953717 is an apocalyptic number.

It is an amenable number.

42242953717 is a deficient number, since it is larger than the sum of its proper divisors (1).

42242953717 is an equidigital number, since it uses as much as digits as its factorization.

42242953717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 46.

The spelling of 42242953717 in words is "forty-two billion, two hundred forty-two million, nine hundred fifty-three thousand, seven hundred seventeen".