1091844166 has 24 divisors (see below), whose sum is σ = 1918886760. Its totient is φ = 464560992.

The previous prime is 1091844161. The next prime is 1091844199. The reversal of 1091844166 is 6614481901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091844161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26455 + ... + 53698.

It is an arithmetic number, because the mean of its divisors is an integer number (79953615).

Almost surely, 2^1091844166 is an apocalyptic number.

1091844166 is a deficient number, since it is larger than the sum of its proper divisors (827042594).

1091844166 is a wasteful number, since it uses less digits than its factorization.

1091844166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80308 (or 80301 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1091844166 is about 33043.0653239072. The cubic root of 1091844166 is about 1029.7225400260.

The spelling of 1091844166 in words is "one billion, ninety-one million, eight hundred forty-four thousand, one hundred sixty-six".