1091116836 has 36 divisors (see below), whose sum is σ = 2762760000. Its totient is φ = 363091248.

The previous prime is 1091116811. The next prime is 1091116841. The reversal of 1091116836 is 6386111901.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1091116836.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3736 + ... + 46863.

Almost surely, 2^1091116836 is an apocalyptic number.

It is an amenable number.

1091116836 is an abundant number, since it is smaller than the sum of its proper divisors (1671643164).

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

1091116836 is a wasteful number, since it uses less digits than its factorization.

1091116836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51208 (or 51203 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 1091116836 is about 33032.0577015723. The cubic root of 1091116836 is about 1029.4938399717.

The spelling of 1091116836 in words is "one billion, ninety-one million, one hundred sixteen thousand, eight hundred thirty-six".