263517902849 has 2 divisors, whose sum is σ = 263517902850. Its totient is φ = 263517902848.

The previous prime is 263517902839. The next prime is 263517902897. The reversal of 263517902849 is 948209715362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 247700313025 + 15817589824 = 497695^2 + 125768^2 .

It is a cyclic number.

It is not a de Polignac number, because 263517902849 - 2¹⁶ = 263517837313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 263517902794 and 263517902803.

It is not a weakly prime, because it can be changed into another prime (263517902839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131758951424 + 131758951425.

It is an arithmetic number, because the mean of its divisors is an integer number (131758951425).

It is a 1-persistent number, because it is pandigital, but 2⋅263517902849 = 527035805698 is not.

Almost surely, 2^263517902849 is an apocalyptic number.

It is an amenable number.

263517902849 is a deficient number, since it is larger than the sum of its proper divisors (1).

263517902849 is an equidigital number, since it uses as much as digits as its factorization.

263517902849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 263517902849 in words is "two hundred sixty-three billion, five hundred seventeen million, nine hundred two thousand, eight hundred forty-nine".