260776161 has 12 divisors (see below), whose sum is σ = 376826580. Its totient is φ = 173781600.

The previous prime is 260776157. The next prime is 260776193. The reversal of 260776161 is 161677062.

It can be written as a sum of positive squares in 2 ways, for example, as 66341025 + 194435136 = 8145^2 + 13944^2 .

It is not a de Polignac number, because 260776161 - 2² = 260776157 is a prime.

It is a super-2 number, since 2×260776161² = 136008412291795842, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (260776361) 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 in 11 ways as a sum of consecutive naturals, for example, 29395 + ... + 37223.

It is an arithmetic number, because the mean of its divisors is an integer number (31402215).

Almost surely, 2^260776161 is an apocalyptic number.

It is an amenable number.

260776161 is a deficient number, since it is larger than the sum of its proper divisors (116050419).

260776161 is a wasteful number, since it uses less digits than its factorization.

260776161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11536 (or 11533 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 260776161 is about 16148.5652923100. The cubic root of 260776161 is about 638.8849080410.

Subtracting from 260776161 its reverse (161677062), we obtain a palindrome (99099099).

The spelling of 260776161 in words is "two hundred sixty million, seven hundred seventy-six thousand, one hundred sixty-one".