261468194 has 32 divisors (see below), whose sum is σ = 451722096. Its totient is φ = 112435200.

The previous prime is 261468187. The next prime is 261468197. The reversal of 261468194 is 491864162.

It can be written as a sum of positive squares in 8 ways, for example, as 243516025 + 17952169 = 15605^2 + 4237^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (261468197) 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 15 ways as a sum of consecutive naturals, for example, 41714 + ... + 47570.

Almost surely, 2^261468194 is an apocalyptic number.

261468194 is a deficient number, since it is larger than the sum of its proper divisors (190253902).

261468194 is a wasteful number, since it uses less digits than its factorization.

261468194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5990.

The product of its digits is 82944, while the sum is 41.

The square root of 261468194 is about 16169.9781694349. The cubic root of 261468194 is about 639.4495543825.

The spelling of 261468194 in words is "two hundred sixty-one million, four hundred sixty-eight thousand, one hundred ninety-four".