771486161 has 2 divisors, whose sum is σ = 771486162. Its totient is φ = 771486160.

The previous prime is 771486139. The next prime is 771486167. The reversal of 771486161 is 161684177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 480442561 + 291043600 = 21919^2 + 17060^2 .

It is a cyclic number.

It is not a de Polignac number, because 771486161 - 2⁶ = 771486097 is a prime.

It is a super-2 number, since 2×771486161² = 1190381793229035842, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (771486167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385743080 + 385743081.

It is an arithmetic number, because the mean of its divisors is an integer number (385743081).

Almost surely, 2^771486161 is an apocalyptic number.

It is an amenable number.

771486161 is a deficient number, since it is larger than the sum of its proper divisors (1).

771486161 is an equidigital number, since it uses as much as digits as its factorization.

771486161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 41.

The square root of 771486161 is about 27775.6397046045. The cubic root of 771486161 is about 917.1549478976.

The spelling of 771486161 in words is "seven hundred seventy-one million, four hundred eighty-six thousand, one hundred sixty-one".