243466155661 has 2 divisors, whose sum is σ = 243466155662. Its totient is φ = 243466155660.

The previous prime is 243466155631. The next prime is 243466155683. The reversal of 243466155661 is 166551664342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237236210761 + 6229944900 = 487069^2 + 78930^2 .

It is a cyclic number.

It is not a de Polignac number, because 243466155661 - 2²⁵ = 243432601229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243466155631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121733077830 + 121733077831.

It is an arithmetic number, because the mean of its divisors is an integer number (121733077831).

Almost surely, 2^243466155661 is an apocalyptic number.

It is an amenable number.

243466155661 is a deficient number, since it is larger than the sum of its proper divisors (1).

243466155661 is an equidigital number, since it uses as much as digits as its factorization.

243466155661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3110400, while the sum is 49.

The spelling of 243466155661 in words is "two hundred forty-three billion, four hundred sixty-six million, one hundred fifty-five thousand, six hundred sixty-one".