268711815803 has 2 divisors, whose sum is σ = 268711815804. Its totient is φ = 268711815802.

The previous prime is 268711815787. The next prime is 268711815857. The reversal of 268711815803 is 308518117862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268711815803 - 2⁴ = 268711815787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (268711815403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134355907901 + 134355907902.

It is an arithmetic number, because the mean of its divisors is an integer number (134355907902).

Almost surely, 2^268711815803 is an apocalyptic number.

268711815803 is a deficient number, since it is larger than the sum of its proper divisors (1).

268711815803 is an equidigital number, since it uses as much as digits as its factorization.

268711815803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 50.

The spelling of 268711815803 in words is "two hundred sixty-eight billion, seven hundred eleven million, eight hundred fifteen thousand, eight hundred three".