116187618991 has 4 divisors (see below), whose sum is σ = 123022184832. Its totient is φ = 109353053152.

The previous prime is 116187618983. The next prime is 116187619019. The reversal of 116187618991 is 199816781611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199816781611 = 23 ⋅8687686157.

It is a cyclic number.

It is not a de Polignac number, because 116187618991 - 2³ = 116187618983 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116187618191) 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, 3417282895 + ... + 3417282928.

It is an arithmetic number, because the mean of its divisors is an integer number (30755546208).

Almost surely, 2^116187618991 is an apocalyptic number.

116187618991 is a deficient number, since it is larger than the sum of its proper divisors (6834565841).

116187618991 is an equidigital number, since it uses as much as digits as its factorization.

116187618991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6834565840.

The product of its digits is 1306368, while the sum is 58.

The spelling of 116187618991 in words is "one hundred sixteen billion, one hundred eighty-seven million, six hundred eighteen thousand, nine hundred ninety-one".