1836081161 has 2 divisors, whose sum is σ = 1836081162. Its totient is φ = 1836081160.

The previous prime is 1836081157. The next prime is 1836081187. The reversal of 1836081161 is 1611806381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1635717136 + 200364025 = 40444^2 + 14155^2 .

It is a cyclic number.

It is not a de Polignac number, because 1836081161 - 2² = 1836081157 is a prime.

It is not a weakly prime, because it can be changed into another prime (1836087161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 918040580 + 918040581.

It is an arithmetic number, because the mean of its divisors is an integer number (918040581).

Almost surely, 2^1836081161 is an apocalyptic number.

It is an amenable number.

1836081161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1836081161 is an equidigital number, since it uses as much as digits as its factorization.

1836081161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 1836081161 is about 42849.5176285568. The cubic root of 1836081161 is about 1224.5145734036.

The spelling of 1836081161 in words is "one billion, eight hundred thirty-six million, eighty-one thousand, one hundred sixty-one".