11123456680 has 48 divisors (see below), whose sum is σ = 29113950420. Its totient is φ = 3813755904.

The previous prime is 11123456621. The next prime is 11123456683. The reversal of 11123456680 is 8665432111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11122233444 + 1223236 = 105462^2 + 1106^2 .

It is not an unprimeable number, because it can be changed into a prime (11123456683) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2835657 + ... + 2839576.

Almost surely, 2^11123456680 is an apocalyptic number.

11123456680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11123456680 is an abundant number, since it is smaller than the sum of its proper divisors (17990493740).

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

11123456680 is a wasteful number, since it uses less digits than its factorization.

11123456680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5675258 (or 5675247 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

Adding to 11123456680 its reverse (8665432111), we get a palindrome (19788888791).

The spelling of 11123456680 in words is "eleven billion, one hundred twenty-three million, four hundred fifty-six thousand, six hundred eighty".