42457426717 has 2 divisors, whose sum is σ = 42457426718. Its totient is φ = 42457426716.

The previous prime is 42457426691. The next prime is 42457426723. The reversal of 42457426717 is 71762475424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38631509401 + 3825917316 = 196549^2 + 61854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42457426717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42457426757) 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, 21228713358 + 21228713359.

It is an arithmetic number, because the mean of its divisors is an integer number (21228713359).

Almost surely, 2^42457426717 is an apocalyptic number.

It is an amenable number.

42457426717 is a deficient number, since it is larger than the sum of its proper divisors (1).

42457426717 is an equidigital number, since it uses as much as digits as its factorization.

42457426717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2634240, while the sum is 49.

The spelling of 42457426717 in words is "forty-two billion, four hundred fifty-seven million, four hundred twenty-six thousand, seven hundred seventeen".