118143450191 has 4 divisors (see below), whose sum is σ = 127231407912. Its totient is φ = 109055492472.

The previous prime is 118143450133. The next prime is 118143450199. The reversal of 118143450191 is 191054341811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191054341811 = 1117 ⋅171042383.

It is a cyclic number.

It is not a de Polignac number, because 118143450191 - 2⁶ = 118143450127 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 (118143450199) 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, 4543978841 + ... + 4543978866.

It is an arithmetic number, because the mean of its divisors is an integer number (31807851978).

Almost surely, 2^118143450191 is an apocalyptic number.

118143450191 is a deficient number, since it is larger than the sum of its proper divisors (9087957721).

118143450191 is an equidigital number, since it uses as much as digits as its factorization.

118143450191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9087957720.

The product of its (nonzero) digits is 17280, while the sum is 38.

The spelling of 118143450191 in words is "one hundred eighteen billion, one hundred forty-three million, four hundred fifty thousand, one hundred ninety-one".