1091473778305 has 16 divisors (see below), whose sum is σ = 1323802215504. Its totient is φ = 863851806720.

The previous prime is 1091473778281. The next prime is 1091473778323. The reversal of 1091473778305 is 5038773741901.

It can be written as a sum of positive squares in 8 ways, for example, as 361407773584 + 730066004721 = 601172^2 + 854439^2 .

It is not a de Polignac number, because 1091473778305 - 2¹¹ = 1091473776257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 1479744 + ... + 2091073.

It is an arithmetic number, because the mean of its divisors is an integer number (82737638469).

Almost surely, 2^{1091473778305} is an apocalyptic number.

It is an amenable number.

1091473778305 is a deficient number, since it is larger than the sum of its proper divisors (232328437199).

1091473778305 is a wasteful number, since it uses less digits than its factorization.

1091473778305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3571476.

The product of its (nonzero) digits is 4445280, while the sum is 55.

The spelling of 1091473778305 in words is "one trillion, ninety-one billion, four hundred seventy-three million, seven hundred seventy-eight thousand, three hundred five".