30644256546181 has 2 divisors, whose sum is σ = 30644256546182. Its totient is φ = 30644256546180.

The previous prime is 30644256546151. The next prime is 30644256546209. The reversal of 30644256546181 is 18164565244603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22235468702500 + 8408787843681 = 4715450^2 + 2899791^2 .

It is an emirp because it is prime and its reverse (18164565244603) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30644256546181 - 2³⁷ = 30506817592709 is a prime.

It is a super-2 number, since 2×30644256546181² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30644256546151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15322128273090 + 15322128273091.

It is an arithmetic number, because the mean of its divisors is an integer number (15322128273091).

Almost surely, 2^{30644256546181} is an apocalyptic number.

It is an amenable number.

30644256546181 is a deficient number, since it is larger than the sum of its proper divisors (1).

30644256546181 is an equidigital number, since it uses as much as digits as its factorization.

30644256546181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16588800, while the sum is 55.

The spelling of 30644256546181 in words is "thirty trillion, six hundred forty-four billion, two hundred fifty-six million, five hundred forty-six thousand, one hundred eighty-one".