11223344556678 has 16 divisors (see below), whose sum is σ = 22968705139776. Its totient is φ = 3654112181160.

The previous prime is 11223344556643. The next prime is 11223344556701. The reversal of 11223344556678 is 87665544332211.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21750667488 + ... + 21750668003.

It is an arithmetic number, because the mean of its divisors is an integer number (1435544071236).

Almost surely, 2^{11223344556678} is an apocalyptic number.

11223344556678 is an abundant number, since it is smaller than the sum of its proper divisors (11745360583098).

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

11223344556678 is a wasteful number, since it uses less digits than its factorization.

11223344556678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43501335539.

The product of its digits is 29030400, while the sum is 57.

Adding to 11223344556678 its reverse (87665544332211), we get a palindrome (98888888888889).

The spelling of 11223344556678 in words is "eleven trillion, two hundred twenty-three billion, three hundred forty-four million, five hundred fifty-six thousand, six hundred seventy-eight".