18233655161 has 2 divisors, whose sum is σ = 18233655162. Its totient is φ = 18233655160.

The previous prime is 18233655151. The next prime is 18233655179. The reversal of 18233655161 is 16155633281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18025747600 + 207907561 = 134260^2 + 14419^2 .

It is a cyclic number.

It is not a de Polignac number, because 18233655161 - 2¹⁰ = 18233654137 is a prime.

It is not a weakly prime, because it can be changed into another prime (18233655131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9116827580 + 9116827581.

It is an arithmetic number, because the mean of its divisors is an integer number (9116827581).

Almost surely, 2^18233655161 is an apocalyptic number.

It is an amenable number.

18233655161 is a deficient number, since it is larger than the sum of its proper divisors (1).

18233655161 is an equidigital number, since it uses as much as digits as its factorization.

18233655161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 41.

The spelling of 18233655161 in words is "eighteen billion, two hundred thirty-three million, six hundred fifty-five thousand, one hundred sixty-one".