1268746026851 has 2 divisors, whose sum is σ = 1268746026852. Its totient is φ = 1268746026850.

The previous prime is 1268746026761. The next prime is 1268746026853. The reversal of 1268746026851 is 1586206478621.

It is a strong prime.

It is an emirp because it is prime and its reverse (1586206478621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1268746026851 is a prime.

Together with 1268746026853, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1268746026853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634373013425 + 634373013426.

It is an arithmetic number, because the mean of its divisors is an integer number (634373013426).

Almost surely, 2^{1268746026851} is an apocalyptic number.

1268746026851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268746026851 is an equidigital number, since it uses as much as digits as its factorization.

1268746026851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7741440, while the sum is 56.

The spelling of 1268746026851 in words is "one trillion, two hundred sixty-eight billion, seven hundred forty-six million, twenty-six thousand, eight hundred fifty-one".