1091741843737 has 2 divisors, whose sum is σ = 1091741843738. Its totient is φ = 1091741843736.

The previous prime is 1091741843693. The next prime is 1091741843821. The reversal of 1091741843737 is 7373481471901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1028609753616 + 63132090121 = 1014204^2 + 251261^2 .

It is a cyclic number.

It is not a de Polignac number, because 1091741843737 - 2³⁵ = 1057382105369 is a prime.

It is a super-2 number, since 2×1091741843737² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1091741813737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545870921868 + 545870921869.

It is an arithmetic number, because the mean of its divisors is an integer number (545870921869).

Almost surely, 2^{1091741843737} is an apocalyptic number.

It is an amenable number.

1091741843737 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091741843737 is an equidigital number, since it uses as much as digits as its factorization.

1091741843737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3556224, while the sum is 55.

The spelling of 1091741843737 in words is "one trillion, ninety-one billion, seven hundred forty-one million, eight hundred forty-three thousand, seven hundred thirty-seven".