261433264 has 20 divisors (see below), whose sum is σ = 510228504. Its totient is φ = 129761408.

The previous prime is 261433247. The next prime is 261433267. The reversal of 261433264 is 462334162.

It is not an unprimeable number, because it can be changed into a prime (261433267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57442 + ... + 61825.

Almost surely, 2^261433264 is an apocalyptic number.

It is an amenable number.

261433264 is a deficient number, since it is larger than the sum of its proper divisors (248795240).

261433264 is a wasteful number, since it uses less digits than its factorization.

261433264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119412 (or 119406 counting only the distinct ones).

The product of its digits is 20736, while the sum is 31.

The square root of 261433264 is about 16168.8980453215. The cubic root of 261433264 is about 639.4210780475.

The spelling of 261433264 in words is "two hundred sixty-one million, four hundred thirty-three thousand, two hundred sixty-four".