30391702661 has 2 divisors, whose sum is σ = 30391702662. Its totient is φ = 30391702660.

The previous prime is 30391702651. The next prime is 30391702667. The reversal of 30391702661 is 16620719303.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26494072900 + 3897629761 = 162770^2 + 62431^2 .

It is a cyclic number.

It is not a de Polignac number, because 30391702661 - 2¹⁴ = 30391686277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30391702667) 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, 15195851330 + 15195851331.

It is an arithmetic number, because the mean of its divisors is an integer number (15195851331).

Almost surely, 2^30391702661 is an apocalyptic number.

It is an amenable number.

30391702661 is a deficient number, since it is larger than the sum of its proper divisors (1).

30391702661 is an equidigital number, since it uses as much as digits as its factorization.

30391702661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The spelling of 30391702661 in words is "thirty billion, three hundred ninety-one million, seven hundred two thousand, six hundred sixty-one".