263806416396269 has 2 divisors, whose sum is σ = 263806416396270. Its totient is φ = 263806416396268.

The previous prime is 263806416396251. The next prime is 263806416396301. The reversal of 263806416396269 is 962693614608362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222527718873769 + 41278697522500 = 14917363^2 + 6424850^2 .

It is a cyclic number.

It is not a de Polignac number, because 263806416396269 - 2¹⁶ = 263806416330733 is a prime.

It is a super-2 number, since 2×263806416396269² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263806416396469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131903208198134 + 131903208198135.

It is an arithmetic number, because the mean of its divisors is an integer number (131903208198135).

Almost surely, 2^{263806416396269} is an apocalyptic number.

It is an amenable number.

263806416396269 is a deficient number, since it is larger than the sum of its proper divisors (1).

263806416396269 is an equidigital number, since it uses as much as digits as its factorization.

263806416396269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725594112, while the sum is 71.

The spelling of 263806416396269 in words is "two hundred sixty-three trillion, eight hundred six billion, four hundred sixteen million, three hundred ninety-six thousand, two hundred sixty-nine".