268693550243 has 2 divisors, whose sum is σ = 268693550244. Its totient is φ = 268693550242.

The previous prime is 268693550207. The next prime is 268693550317. The reversal of 268693550243 is 342055396862.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268693550243 is a prime.

It is not a weakly prime, because it can be changed into another prime (268693550843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134346775121 + 134346775122.

It is an arithmetic number, because the mean of its divisors is an integer number (134346775122).

Almost surely, 2^268693550243 is an apocalyptic number.

268693550243 is a deficient number, since it is larger than the sum of its proper divisors (1).

268693550243 is an equidigital number, since it uses as much as digits as its factorization.

268693550243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9331200, while the sum is 53.

The spelling of 268693550243 in words is "two hundred sixty-eight billion, six hundred ninety-three million, five hundred fifty thousand, two hundred forty-three".