263655702481 has 2 divisors, whose sum is σ = 263655702482. Its totient is φ = 263655702480.

The previous prime is 263655702451. The next prime is 263655702533. The reversal of 263655702481 is 184207556362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256218192400 + 7437510081 = 506180^2 + 86241^2 .

It is a cyclic number.

It is not a de Polignac number, because 263655702481 - 2⁷ = 263655702353 is a prime.

It is a super-2 number, since 2×263655702481² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (263655702451) by changing a digit.

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 as a sum of consecutive naturals, namely, 131827851240 + 131827851241.

It is an arithmetic number, because the mean of its divisors is an integer number (131827851241).

Almost surely, 2^263655702481 is an apocalyptic number.

It is an amenable number.

263655702481 is a deficient number, since it is larger than the sum of its proper divisors (1).

263655702481 is an equidigital number, since it uses as much as digits as its factorization.

263655702481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2419200, while the sum is 49.

The spelling of 263655702481 in words is "two hundred sixty-three billion, six hundred fifty-five million, seven hundred two thousand, four hundred eighty-one".