111944165854691 has 8 divisors (see below), whose sum is σ = 114686707282224. Its totient is φ = 109202205185280.

The previous prime is 111944165854621. The next prime is 111944165854733. The reversal of 111944165854691 is 196458561449111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111944165854691 - 2¹⁸ = 111944165592547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111944165854601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144799286 + ... + 145570331.

It is an arithmetic number, because the mean of its divisors is an integer number (14335838410278).

Almost surely, 2^{111944165854691} is an apocalyptic number.

111944165854691 is a deficient number, since it is larger than the sum of its proper divisors (2742541427533).

111944165854691 is an equidigital number, since it uses as much as digits as its factorization.

111944165854691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290379061.

The product of its digits is 37324800, while the sum is 65.

The spelling of 111944165854691 in words is "one hundred eleven trillion, nine hundred forty-four billion, one hundred sixty-five million, eight hundred fifty-four thousand, six hundred ninety-one".