1091317771277 has 2 divisors, whose sum is σ = 1091317771278. Its totient is φ = 1091317771276.

The previous prime is 1091317771267. The next prime is 1091317771283. The reversal of 1091317771277 is 7721777131901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 819615166276 + 271702605001 = 905326^2 + 521251^2 .

It is a cyclic number.

It is not a de Polignac number, because 1091317771277 - 2⁴ = 1091317771261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1091317771267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545658885638 + 545658885639.

It is an arithmetic number, because the mean of its divisors is an integer number (545658885639).

Almost surely, 2^{1091317771277} is an apocalyptic number.

It is an amenable number.

1091317771277 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091317771277 is an equidigital number, since it uses as much as digits as its factorization.

1091317771277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907578, while the sum is 53.

The spelling of 1091317771277 in words is "one trillion, ninety-one billion, three hundred seventeen million, seven hundred seventy-one thousand, two hundred seventy-seven".