85776161 has 2 divisors, whose sum is σ = 85776162. Its totient is φ = 85776160.

The previous prime is 85776157. The next prime is 85776167. The reversal of 85776161 is 16167758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85747600 + 28561 = 9260^2 + 169^2 .

It is a cyclic number.

It is not a de Polignac number, because 85776161 - 2² = 85776157 is a prime.

It is a plaindrome in base 11.

It is a zygodrome in base 11.

It is not a weakly prime, because it can be changed into another prime (85776167) 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, 42888080 + 42888081.

It is an arithmetic number, because the mean of its divisors is an integer number (42888081).

Almost surely, 2^85776161 is an apocalyptic number.

It is an amenable number.

85776161 is a deficient number, since it is larger than the sum of its proper divisors (1).

85776161 is an equidigital number, since it uses as much as digits as its factorization.

85776161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 41.

The square root of 85776161 is about 9261.5420422303. The cubic root of 85776161 is about 441.0172075220.

The spelling of 85776161 in words is "eighty-five million, seven hundred seventy-six thousand, one hundred sixty-one".