30642250517 has 2 divisors, whose sum is σ = 30642250518. Its totient is φ = 30642250516.

The previous prime is 30642250489. The next prime is 30642250571. The reversal of 30642250517 is 71505224603.

Together with next prime (30642250571) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23321565796 + 7320684721 = 152714^2 + 85561^2 .

It is a cyclic number.

It is not a de Polignac number, because 30642250517 - 2⁶ = 30642250453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30642250417) 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, 15321125258 + 15321125259.

It is an arithmetic number, because the mean of its divisors is an integer number (15321125259).

Almost surely, 2^30642250517 is an apocalyptic number.

It is an amenable number.

30642250517 is a deficient number, since it is larger than the sum of its proper divisors (1).

30642250517 is an equidigital number, since it uses as much as digits as its factorization.

30642250517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 30642250517 in words is "thirty billion, six hundred forty-two million, two hundred fifty thousand, five hundred seventeen".