260305304125505 has 16 divisors (see below), whose sum is σ = 342145714147920. Its totient is φ = 189236148068352.

The previous prime is 260305304125459. The next prime is 260305304125511. The reversal of 260305304125505 is 505521403503062.

It can be written as a sum of positive squares in 8 ways, for example, as 54086743388161 + 206218560737344 = 7354369^2 + 14360312^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-260305304125505 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52800262064 + ... + 52800266993.

It is an arithmetic number, because the mean of its divisors is an integer number (21384107134245).

Almost surely, 2^{260305304125505} is an apocalyptic number.

It is an amenable number.

260305304125505 is a deficient number, since it is larger than the sum of its proper divisors (81840410022415).

260305304125505 is a wasteful number, since it uses less digits than its factorization.

260305304125505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105600529108.

The product of its (nonzero) digits is 540000, while the sum is 41.

Adding to 260305304125505 its reverse (505521403503062), we get a palindrome (765826707628567).

The spelling of 260305304125505 in words is "two hundred sixty trillion, three hundred five billion, three hundred four million, one hundred twenty-five thousand, five hundred five".