11223556779 has 8 divisors (see below), whose sum is σ = 14968306240. Its totient is φ = 7480589256.

The previous prime is 11223556763. The next prime is 11223556793. The reversal of 11223556779 is 97765532211.

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

It is not a de Polignac number, because 11223556779 - 2⁴ = 11223556763 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11223556679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430717 + ... + 456030.

It is an arithmetic number, because the mean of its divisors is an integer number (1871038280).

Almost surely, 2^11223556779 is an apocalyptic number.

11223556779 is a deficient number, since it is larger than the sum of its proper divisors (3744749461).

11223556779 is an equidigital number, since it uses as much as digits as its factorization.

11223556779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890969.

The product of its digits is 793800, while the sum is 48.

The spelling of 11223556779 in words is "eleven billion, two hundred twenty-three million, five hundred fifty-six thousand, seven hundred seventy-nine".