776223161 has 6 divisors (see below), whose sum is σ = 902953530. Its totient is φ = 665334096.

The previous prime is 776223139. The next prime is 776223187. The reversal of 776223161 is 161322677.

776223161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 633277225 + 142945936 = 25165^2 + 11956^2 .

It is not a de Polignac number, because 776223161 - 2¹⁴ = 776206777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (776223101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7920596 + ... + 7920693.

It is an arithmetic number, because the mean of its divisors is an integer number (150492255).

Almost surely, 2^776223161 is an apocalyptic number.

It is an amenable number.

776223161 is a deficient number, since it is larger than the sum of its proper divisors (126730369).

776223161 is a wasteful number, since it uses less digits than its factorization.

776223161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15841303 (or 15841296 counting only the distinct ones).

The product of its digits is 21168, while the sum is 35.

The square root of 776223161 is about 27860.7817729510. The cubic root of 776223161 is about 919.0282591778.

The spelling of 776223161 in words is "seven hundred seventy-six million, two hundred twenty-three thousand, one hundred sixty-one".