80616161 has 2 divisors, whose sum is σ = 80616162. Its totient is φ = 80616160.

The previous prime is 80616131. The next prime is 80616167. The reversal of 80616161 is 16161608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80550625 + 65536 = 8975^2 + 256^2 .

It is a cyclic number.

It is not a de Polignac number, because 80616161 - 2¹⁴ = 80599777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80616167) 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, 40308080 + 40308081.

It is an arithmetic number, because the mean of its divisors is an integer number (40308081).

Almost surely, 2^80616161 is an apocalyptic number.

It is an amenable number.

80616161 is a deficient number, since it is larger than the sum of its proper divisors (1).

80616161 is an equidigital number, since it uses as much as digits as its factorization.

80616161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 80616161 is about 8978.6502883229. The cubic root of 80616161 is about 431.9903422195.

Adding to 80616161 its reverse (16161608), we get a palindrome (96777769).

The spelling of 80616161 in words is "eighty million, six hundred sixteen thousand, one hundred sixty-one".