42513747517 has 2 divisors, whose sum is σ = 42513747518. Its totient is φ = 42513747516.

The previous prime is 42513747503. The next prime is 42513747569. The reversal of 42513747517 is 71574731524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41422832676 + 1090914841 = 203526^2 + 33029^2 .

It is a cyclic number.

It is not a de Polignac number, because 42513747517 - 2³¹ = 40366263869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42513747317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21256873758 + 21256873759.

It is an arithmetic number, because the mean of its divisors is an integer number (21256873759).

Almost surely, 2^42513747517 is an apocalyptic number.

It is an amenable number.

42513747517 is a deficient number, since it is larger than the sum of its proper divisors (1).

42513747517 is an equidigital number, since it uses as much as digits as its factorization.

42513747517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 823200, while the sum is 46.

The spelling of 42513747517 in words is "forty-two billion, five hundred thirteen million, seven hundred forty-seven thousand, five hundred seventeen".