111444477778 has 8 divisors (see below), whose sum is σ = 167169753072. Its totient is φ = 55721226756.

The previous prime is 111444477769. The next prime is 111444477803. The reversal of 111444477778 is 877774444111.

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

It is a super-2 number, since 2×111444477778² (a number of 23 digits) contains 22 as substring.

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360000 + ... + 593707.

It is an arithmetic number, because the mean of its divisors is an integer number (20896219134).

Almost surely, 2^111444477778 is an apocalyptic number.

111444477778 is a deficient number, since it is larger than the sum of its proper divisors (55725275294).

111444477778 is an equidigital number, since it uses as much as digits as its factorization.

111444477778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012136.

The product of its digits is 4917248, while the sum is 55.

The spelling of 111444477778 in words is "one hundred eleven billion, four hundred forty-four million, four hundred seventy-seven thousand, seven hundred seventy-eight".