816062161 has 2 divisors, whose sum is σ = 816062162. Its totient is φ = 816062160.

The previous prime is 816062153. The next prime is 816062171. The reversal of 816062161 is 161260618.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 761760000 + 54302161 = 27600^2 + 7369^2 .

It is a cyclic number.

It is not a de Polignac number, because 816062161 - 2³ = 816062153 is a prime.

It is not a weakly prime, because it can be changed into another prime (816062111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408031080 + 408031081.

It is an arithmetic number, because the mean of its divisors is an integer number (408031081).

Almost surely, 2^816062161 is an apocalyptic number.

It is an amenable number.

816062161 is a deficient number, since it is larger than the sum of its proper divisors (1).

816062161 is an equidigital number, since it uses as much as digits as its factorization.

816062161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 816062161 is about 28566.8017285800. The cubic root of 816062161 is about 934.4894735511.

The spelling of 816062161 in words is "eight hundred sixteen million, sixty-two thousand, one hundred sixty-one".