261443463 has 8 divisors (see below), whose sum is σ = 352508400. Its totient is φ = 172337088.

The previous prime is 261443453. The next prime is 261443471. The reversal of 261443463 is 364344162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 261443463 - 2⁵ = 261443431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261443453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 489328 + ... + 489861.

It is an arithmetic number, because the mean of its divisors is an integer number (44063550).

Almost surely, 2^261443463 is an apocalyptic number.

261443463 is a deficient number, since it is larger than the sum of its proper divisors (91064937).

261443463 is an equidigital number, since it uses as much as digits as its factorization.

261443463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979281.

The product of its digits is 41472, while the sum is 33.

The square root of 261443463 is about 16169.2134317041. The cubic root of 261443463 is about 639.4293929430.

The spelling of 261443463 in words is "two hundred sixty-one million, four hundred forty-three thousand, four hundred sixty-three".