1091842760849 has 4 divisors (see below), whose sum is σ = 1099697744880. Its totient is φ = 1083987776820.

The previous prime is 1091842760843. The next prime is 1091842760857. The reversal of 1091842760849 is 9480672481901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1091842760849 - 2¹⁶ = 1091842695313 is a prime.

It is a super-2 number, since 2×1091842760849² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1091842760843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3927491807 + ... + 3927492084.

It is an arithmetic number, because the mean of its divisors is an integer number (274924436220).

Almost surely, 2^{1091842760849} is an apocalyptic number.

It is an amenable number.

1091842760849 is a deficient number, since it is larger than the sum of its proper divisors (7854984031).

1091842760849 is an equidigital number, since it uses as much as digits as its factorization.

1091842760849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7854984030.

The product of its (nonzero) digits is 6967296, while the sum is 59.

The spelling of 1091842760849 in words is "one trillion, ninety-one billion, eight hundred forty-two million, seven hundred sixty thousand, eight hundred forty-nine".