261450266 has 24 divisors (see below), whose sum is σ = 492653280. Its totient is φ = 101863080.

The previous prime is 261450253. The next prime is 261450307. The reversal of 261450266 is 662054162.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75476 + ... + 78863.

It is an arithmetic number, because the mean of its divisors is an integer number (20527220).

Almost surely, 2^261450266 is an apocalyptic number.

261450266 is a deficient number, since it is larger than the sum of its proper divisors (231203014).

261450266 is a wasteful number, since it uses less digits than its factorization.

261450266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154370 (or 154359 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 261450266 is about 16169.4237992577. The cubic root of 261450266 is about 639.4349390757.

The spelling of 261450266 in words is "two hundred sixty-one million, four hundred fifty thousand, two hundred sixty-six".