111663191378 has 8 divisors (see below), whose sum is σ = 167748185100. Its totient is φ = 55747129680.

The previous prime is 111663191377. The next prime is 111663191383. The reversal of 111663191378 is 873191366111.

It can be written as a sum of positive squares in 2 ways, for example, as 84551263729 + 27111927649 = 290777^2 + 164657^2 .

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

It is not an unprimeable number, because it can be changed into a prime (111663191377) 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, 42231353 + ... + 42233996.

Almost surely, 2^111663191378 is an apocalyptic number.

111663191378 is a deficient number, since it is larger than the sum of its proper divisors (56084993722).

111663191378 is an equidigital number, since it uses as much as digits as its factorization.

111663191378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84466012.

The product of its digits is 163296, while the sum is 47.

The spelling of 111663191378 in words is "one hundred eleven billion, six hundred sixty-three million, one hundred ninety-one thousand, three hundred seventy-eight".