1091317771309 has 8 divisors (see below), whose sum is σ = 1091807311680. Its totient is φ = 1090828334400.

The previous prime is 1091317771283. The next prime is 1091317771339. The reversal of 1091317771309 is 9031777131901.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1091317771309 - 2⁵ = 1091317771277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091317771339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27099429 + ... + 27139669.

It is an arithmetic number, because the mean of its divisors is an integer number (136475913960).

Almost surely, 2^{1091317771309} is an apocalyptic number.

It is an amenable number.

1091317771309 is a deficient number, since it is larger than the sum of its proper divisors (489540371).

1091317771309 is an equidigital number, since it uses as much as digits as its factorization.

1091317771309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51731.

The product of its (nonzero) digits is 250047, while the sum is 49.

It can be divided in two parts, 10 and 91317771309, that added together give a palindrome (91317771319).

The spelling of 1091317771309 in words is "one trillion, ninety-one billion, three hundred seventeen million, seven hundred seventy-one thousand, three hundred nine".