30506133661 has 2 divisors, whose sum is σ = 30506133662. Its totient is φ = 30506133660.

The previous prime is 30506133641. The next prime is 30506133703. The reversal of 30506133661 is 16633160503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17184588100 + 13321545561 = 131090^2 + 115419^2 .

It is an emirp because it is prime and its reverse (16633160503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30506133661 - 2⁵ = 30506133629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30506133641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15253066830 + 15253066831.

It is an arithmetic number, because the mean of its divisors is an integer number (15253066831).

Almost surely, 2^30506133661 is an apocalyptic number.

It is an amenable number.

30506133661 is a deficient number, since it is larger than the sum of its proper divisors (1).

30506133661 is an equidigital number, since it uses as much as digits as its factorization.

30506133661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 34.

The spelling of 30506133661 in words is "thirty billion, five hundred six million, one hundred thirty-three thousand, six hundred sixty-one".