260911543 has 4 divisors (see below), whose sum is σ = 260969040. Its totient is φ = 260854048.

The previous prime is 260911513. The next prime is 260911589. The reversal of 260911543 is 345119062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345119062 = 2 ⋅172559531.

It is a cyclic number.

It is not a de Polignac number, because 260911543 - 2⁹ = 260911031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260911513) 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 3 ways as a sum of consecutive naturals, for example, 21298 + ... + 31231.

It is an arithmetic number, because the mean of its divisors is an integer number (65242260).

Almost surely, 2^260911543 is an apocalyptic number.

260911543 is a deficient number, since it is larger than the sum of its proper divisors (57497).

260911543 is an equidigital number, since it uses as much as digits as its factorization.

260911543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57496.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 260911543 is about 16152.7565139824. The cubic root of 260911543 is about 638.9954479934.

The spelling of 260911543 in words is "two hundred sixty million, nine hundred eleven thousand, five hundred forty-three".