116181891 has 48 divisors (see below), whose sum is σ = 201998880. Its totient is φ = 65802240.

The previous prime is 116181889. The next prime is 116181911. The reversal of 116181891 is 198181611.

It is not a de Polignac number, because 116181891 - 2¹ = 116181889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (116181811) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 180931 + ... + 181571.

It is an arithmetic number, because the mean of its divisors is an integer number (4208310).

Almost surely, 2^116181891 is an apocalyptic number.

116181891 is a deficient number, since it is larger than the sum of its proper divisors (85816989).

116181891 is a wasteful number, since it uses less digits than its factorization.

116181891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801 (or 788 counting only the distinct ones).

The product of its digits is 3456, while the sum is 36.

The square root of 116181891 is about 10778.7703844177. The cubic root of 116181891 is about 487.9546716721.

The spelling of 116181891 in words is "one hundred sixteen million, one hundred eighty-one thousand, eight hundred ninety-one".