30742806517 has 2 divisors, whose sum is σ = 30742806518. Its totient is φ = 30742806516.

The previous prime is 30742806499. The next prime is 30742806557. The reversal of 30742806517 is 71560824703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29878505316 + 864301201 = 172854^2 + 29399^2 .

It is a cyclic number.

It is not a de Polignac number, because 30742806517 - 2³¹ = 28595322869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30742806557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15371403258 + 15371403259.

It is an arithmetic number, because the mean of its divisors is an integer number (15371403259).

Almost surely, 2^30742806517 is an apocalyptic number.

It is an amenable number.

30742806517 is a deficient number, since it is larger than the sum of its proper divisors (1).

30742806517 is an equidigital number, since it uses as much as digits as its factorization.

30742806517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 43.

The spelling of 30742806517 in words is "thirty billion, seven hundred forty-two million, eight hundred six thousand, five hundred seventeen".