116547881591 has 4 divisors (see below), whose sum is σ = 116548827384. Its totient is φ = 116546935800.

The previous prime is 116547881587. The next prime is 116547881609. The reversal of 116547881591 is 195188745611.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 195188745611 = 37 ⋅5275371503.

It is a cyclic number.

It is not a de Polignac number, because 116547881591 - 2² = 116547881587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116547881501) 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, 254405 + ... + 545726.

It is an arithmetic number, because the mean of its divisors is an integer number (29137206846).

Almost surely, 2^116547881591 is an apocalyptic number.

116547881591 is a deficient number, since it is larger than the sum of its proper divisors (945793).

116547881591 is an equidigital number, since it uses as much as digits as its factorization.

116547881591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945792.

The product of its digits is 2419200, while the sum is 56.

The spelling of 116547881591 in words is "one hundred sixteen billion, five hundred forty-seven million, eight hundred eighty-one thousand, five hundred ninety-one".