1135818891 has 6 divisors (see below), whose sum is σ = 1640627300. Its totient is φ = 757212588.

The previous prime is 1135818883. The next prime is 1135818911. The reversal of 1135818891 is 1988185311.

It is not a de Polignac number, because 1135818891 - 2³ = 1135818883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1135818851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 63101041 + ... + 63101058.

Almost surely, 2^1135818891 is an apocalyptic number.

1135818891 is a deficient number, since it is larger than the sum of its proper divisors (504808409).

1135818891 is a wasteful number, since it uses less digits than its factorization.

1135818891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126202105 (or 126202102 counting only the distinct ones).

The product of its digits is 69120, while the sum is 45.

The square root of 1135818891 is about 33701.9122751217. The cubic root of 1135818891 is about 1043.3652365202.

The spelling of 1135818891 in words is "one billion, one hundred thirty-five million, eight hundred eighteen thousand, eight hundred ninety-one".