268648886591 has 2 divisors, whose sum is σ = 268648886592. Its totient is φ = 268648886590.

The previous prime is 268648886587. The next prime is 268648886593. The reversal of 268648886591 is 195688846862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268648886591 - 2² = 268648886587 is a prime.

Together with 268648886593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268648886593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134324443295 + 134324443296.

It is an arithmetic number, because the mean of its divisors is an integer number (134324443296).

Almost surely, 2^268648886591 is an apocalyptic number.

268648886591 is a deficient number, since it is larger than the sum of its proper divisors (1).

268648886591 is an equidigital number, since it uses as much as digits as its factorization.

268648886591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 318504960, while the sum is 71.

The spelling of 268648886591 in words is "two hundred sixty-eight billion, six hundred forty-eight million, eight hundred eighty-six thousand, five hundred ninety-one".