263946268991 has 2 divisors, whose sum is σ = 263946268992. Its totient is φ = 263946268990.

The previous prime is 263946268987. The next prime is 263946269017. The reversal of 263946268991 is 199862649362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 263946268991 - 2² = 263946268987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (263946268931) 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, 131973134495 + 131973134496.

It is an arithmetic number, because the mean of its divisors is an integer number (131973134496).

Almost surely, 2^263946268991 is an apocalyptic number.

263946268991 is a deficient number, since it is larger than the sum of its proper divisors (1).

263946268991 is an equidigital number, since it uses as much as digits as its factorization.

263946268991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60466176, while the sum is 65.

The spelling of 263946268991 in words is "two hundred sixty-three billion, nine hundred forty-six million, two hundred sixty-eight thousand, nine hundred ninety-one".