11111112345678 has 8 divisors (see below), whose sum is σ = 22222224691368. Its totient is φ = 3703704115224.

The previous prime is 11111112345677. The next prime is 11111112345701. The reversal of 11111112345678 is 87654321111111.

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

11111112345678 is an admirable number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111112345677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 925926028801 + ... + 925926028812.

It is an arithmetic number, because the mean of its divisors is an integer number (2777778086421).

Almost surely, 2^{11111112345678} is an apocalyptic number.

11111112345678 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.

11111112345678 is a wasteful number, since it uses less digits than its factorization.

11111112345678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851852057618.

The product of its digits is 40320, while the sum is 42.

Adding to 11111112345678 its reverse (87654321111111), we get a palindrome (98765433456789).

The spelling of 11111112345678 in words is "eleven trillion, one hundred eleven billion, one hundred twelve million, three hundred forty-five thousand, six hundred seventy-eight".