42605494717 has 2 divisors, whose sum is σ = 42605494718. Its totient is φ = 42605494716.

The previous prime is 42605494697. The next prime is 42605494751. The reversal of 42605494717 is 71749450624.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41165975236 + 1439519481 = 202894^2 + 37941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42605494717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42605492717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21302747358 + 21302747359.

It is an arithmetic number, because the mean of its divisors is an integer number (21302747359).

Almost surely, 2^42605494717 is an apocalyptic number.

It is an amenable number.

42605494717 is a deficient number, since it is larger than the sum of its proper divisors (1).

42605494717 is an equidigital number, since it uses as much as digits as its factorization.

42605494717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 42605494717 in words is "forty-two billion, six hundred five million, four hundred ninety-four thousand, seven hundred seventeen".