260563553 has 2 divisors, whose sum is σ = 260563554. Its totient is φ = 260563552.

The previous prime is 260563493. The next prime is 260563559. The reversal of 260563553 is 355365062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193126609 + 67436944 = 13897^2 + 8212^2 .

It is a cyclic number.

It is not a de Polignac number, because 260563553 - 2¹⁰ = 260562529 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (260563559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130281776 + 130281777.

It is an arithmetic number, because the mean of its divisors is an integer number (130281777).

Almost surely, 2^260563553 is an apocalyptic number.

It is an amenable number.

260563553 is a deficient number, since it is larger than the sum of its proper divisors (1).

260563553 is an equidigital number, since it uses as much as digits as its factorization.

260563553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 35.

The square root of 260563553 is about 16141.9810742052. The cubic root of 260563553 is about 638.7112355028.

The spelling of 260563553 in words is "two hundred sixty million, five hundred sixty-three thousand, five hundred fifty-three".