1606105181 has 2 divisors, whose sum is σ = 1606105182. Its totient is φ = 1606105180.

The previous prime is 1606105159. The next prime is 1606105183. The reversal of 1606105181 is 1815016061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 943042681 + 663062500 = 30709^2 + 25750^2 .

It is a cyclic number.

It is not a de Polignac number, because 1606105181 - 2⁶ = 1606105117 is a prime.

It is a super-2 number, since 2×1606105181² = 5159147704870085522, which contains 22 as substring.

Together with 1606105183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1606105183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803052590 + 803052591.

It is an arithmetic number, because the mean of its divisors is an integer number (803052591).

Almost surely, 2^1606105181 is an apocalyptic number.

It is an amenable number.

1606105181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1606105181 is an equidigital number, since it uses as much as digits as its factorization.

1606105181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 1606105181 is about 40076.2421017740. The cubic root of 1606105181 is about 1171.0928452685.

The spelling of 1606105181 in words is "one billion, six hundred six million, one hundred five thousand, one hundred eighty-one".