268778996771 has 2 divisors, whose sum is σ = 268778996772. Its totient is φ = 268778996770.

The previous prime is 268778996713. The next prime is 268778996779. The reversal of 268778996771 is 177699877862.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-268778996771 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 268778996692 and 268778996701.

It is not a weakly prime, because it can be changed into another prime (268778996779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134389498385 + 134389498386.

It is an arithmetic number, because the mean of its divisors is an integer number (134389498386).

Almost surely, 2^268778996771 is an apocalyptic number.

268778996771 is a deficient number, since it is larger than the sum of its proper divisors (1).

268778996771 is an equidigital number, since it uses as much as digits as its factorization.

268778996771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896168448, while the sum is 77.

The spelling of 268778996771 in words is "two hundred sixty-eight billion, seven hundred seventy-eight million, nine hundred ninety-six thousand, seven hundred seventy-one".