30730712561 has 2 divisors, whose sum is σ = 30730712562. Its totient is φ = 30730712560.

The previous prime is 30730712543. The next prime is 30730712569. The reversal of 30730712561 is 16521703703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29754525025 + 976187536 = 172495^2 + 31244^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30730712561 is a prime.

It is not a weakly prime, because it can be changed into another prime (30730712569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15365356280 + 15365356281.

It is an arithmetic number, because the mean of its divisors is an integer number (15365356281).

Almost surely, 2^30730712561 is an apocalyptic number.

It is an amenable number.

30730712561 is a deficient number, since it is larger than the sum of its proper divisors (1).

30730712561 is an equidigital number, since it uses as much as digits as its factorization.

30730712561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 35.

The spelling of 30730712561 in words is "thirty billion, seven hundred thirty million, seven hundred twelve thousand, five hundred sixty-one".