775891077811 has 2 divisors, whose sum is σ = 775891077812. Its totient is φ = 775891077810.

The previous prime is 775891077803. The next prime is 775891077839. The reversal of 775891077811 is 118770198577.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 775891077811 - 2³ = 775891077803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 775891077811.

It is not a weakly prime, because it can be changed into another prime (775891077881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387945538905 + 387945538906.

It is an arithmetic number, because the mean of its divisors is an integer number (387945538906).

Almost surely, 2^775891077811 is an apocalyptic number.

775891077811 is a deficient number, since it is larger than the sum of its proper divisors (1).

775891077811 is an equidigital number, since it uses as much as digits as its factorization.

775891077811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6914880, while the sum is 61.

The spelling of 775891077811 in words is "seven hundred seventy-five billion, eight hundred ninety-one million, seventy-seven thousand, eight hundred eleven".