261648303 has 16 divisors (see below), whose sum is σ = 405461760. Its totient is φ = 146978496.

The previous prime is 261648293. The next prime is 261648307. The reversal of 261648303 is 303846162.

It is not a de Polignac number, because 261648303 - 2⁵ = 261648271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261648307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104350 + ... + 106827.

It is an arithmetic number, because the mean of its divisors is an integer number (25341360).

Almost surely, 2^261648303 is an apocalyptic number.

261648303 is a deficient number, since it is larger than the sum of its proper divisors (143813457).

261648303 is a wasteful number, since it uses less digits than its factorization.

261648303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211246.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 261648303 is about 16175.5464513568. The cubic root of 261648303 is about 639.5963462141.

The spelling of 261648303 in words is "two hundred sixty-one million, six hundred forty-eight thousand, three hundred three".