1091866849194 has 32 divisors (see below), whose sum is σ = 2382809962176. Its totient is φ = 330791656320.

The previous prime is 1091866849193. The next prime is 1091866849207. The reversal of 1091866849194 is 4919486681901.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (1091866849193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1641397 + ... + 2208600.

It is an arithmetic number, because the mean of its divisors is an integer number (74462811318).

Almost surely, 2^{1091866849194} is an apocalyptic number.

1091866849194 is an abundant number, since it is smaller than the sum of its proper divisors (1290943112982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1091866849194 is a wasteful number, since it uses less digits than its factorization.

1091866849194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3854310.

The product of its (nonzero) digits is 26873856, while the sum is 66.

The spelling of 1091866849194 in words is "one trillion, ninety-one billion, eight hundred sixty-six million, eight hundred forty-nine thousand, one hundred ninety-four".