1891116196 has 12 divisors (see below), whose sum is σ = 3325139440. Its totient is φ = 941076360.

The previous prime is 1891116191. The next prime is 1891116197. The reversal of 1891116196 is 6916111981.

It is not an unprimeable number, because it can be changed into a prime (1891116191) 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, 1119486 + ... + 1121173.

Almost surely, 2^1891116196 is an apocalyptic number.

It is an amenable number.

1891116196 is a deficient number, since it is larger than the sum of its proper divisors (1434023244).

1891116196 is a wasteful number, since it uses less digits than its factorization.

1891116196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240874 (or 2240872 counting only the distinct ones).

The product of its digits is 23328, while the sum is 43.

The square root of 1891116196 is about 43486.9658173573. The cubic root of 1891116196 is about 1236.6289368672.

The spelling of 1891116196 in words is "one billion, eight hundred ninety-one million, one hundred sixteen thousand, one hundred ninety-six".