1111223456778 has 8 divisors (see below), whose sum is σ = 2222446913568. Its totient is φ = 370407818924.

The previous prime is 1111223456771. The next prime is 1111223456807. The reversal of 1111223456778 is 8776543221111.

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

1111223456778 is an admirable number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1111223456771) 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, 92601954726 + ... + 92601954737.

It is an arithmetic number, because the mean of its divisors is an integer number (277805864196).

Almost surely, 2^{1111223456778} is an apocalyptic number.

1111223456778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1111223456778 is a wasteful number, since it uses less digits than its factorization.

1111223456778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185203909468.

The product of its digits is 564480, while the sum is 48.

Adding to 1111223456778 its reverse (8776543221111), we get a palindrome (9887766677889).

The spelling of 1111223456778 in words is "one trillion, one hundred eleven billion, two hundred twenty-three million, four hundred fifty-six thousand, seven hundred seventy-eight".