18580056161 has 2 divisors, whose sum is σ = 18580056162. Its totient is φ = 18580056160.

The previous prime is 18580056137. The next prime is 18580056163. The reversal of 18580056161 is 16165008581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14080195600 + 4499860561 = 118660^2 + 67081^2 .

It is a cyclic number.

It is not a de Polignac number, because 18580056161 - 2⁶ = 18580056097 is a prime.

Together with 18580056163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (18580056163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9290028080 + 9290028081.

It is an arithmetic number, because the mean of its divisors is an integer number (9290028081).

Almost surely, 2^18580056161 is an apocalyptic number.

It is an amenable number.

18580056161 is a deficient number, since it is larger than the sum of its proper divisors (1).

18580056161 is an equidigital number, since it uses as much as digits as its factorization.

18580056161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 41.

The spelling of 18580056161 in words is "eighteen billion, five hundred eighty million, fifty-six thousand, one hundred sixty-one".