261168196 has 12 divisors (see below), whose sum is σ = 468192060. Its totient is φ = 127399040.

The previous prime is 261168119. The next prime is 261168203. The reversal of 261168196 is 691861162.

It can be written as a sum of positive squares in 2 ways, for example, as 83905600 + 177262596 = 9160^2 + 13314^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 796081 + ... + 796408.

It is an arithmetic number, because the mean of its divisors is an integer number (39016005).

Almost surely, 2^261168196 is an apocalyptic number.

It is an amenable number.

261168196 is a deficient number, since it is larger than the sum of its proper divisors (207023864).

261168196 is a wasteful number, since it uses less digits than its factorization.

261168196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592534 (or 1592532 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The square root of 261168196 is about 16160.6991185406. The cubic root of 261168196 is about 639.2049012966.

It can be divided in two parts, 2611 and 68196, that added together give a palindrome (70807).

The spelling of 261168196 in words is "two hundred sixty-one million, one hundred sixty-eight thousand, one hundred ninety-six".