42442806517 has 2 divisors, whose sum is σ = 42442806518. Its totient is φ = 42442806516.

The previous prime is 42442806481. The next prime is 42442806533. The reversal of 42442806517 is 71560824424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42104577636 + 338228881 = 205194^2 + 18391^2 .

It is a cyclic number.

It is not a de Polignac number, because 42442806517 - 2¹⁵ = 42442773749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42442506517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21221403258 + 21221403259.

It is an arithmetic number, because the mean of its divisors is an integer number (21221403259).

Almost surely, 2^42442806517 is an apocalyptic number.

It is an amenable number.

42442806517 is a deficient number, since it is larger than the sum of its proper divisors (1).

42442806517 is an equidigital number, since it uses as much as digits as its factorization.

42442806517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 43.

The spelling of 42442806517 in words is "forty-two billion, four hundred forty-two million, eight hundred six thousand, five hundred seventeen".