11113457780 has 12 divisors (see below), whose sum is σ = 23338261380. Its totient is φ = 4445383104.

The previous prime is 11113457777. The next prime is 11113457867. The reversal of 11113457780 is 8775431111.

11113457780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1627476964 + 9485980816 = 40342^2 + 97396^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277836425 + ... + 277836464.

It is an arithmetic number, because the mean of its divisors is an integer number (1944855115).

Almost surely, 2^11113457780 is an apocalyptic number.

11113457780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11113457780 is an abundant number, since it is smaller than the sum of its proper divisors (12224803600).

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

11113457780 is a wasteful number, since it uses less digits than its factorization.

11113457780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555672898 (or 555672896 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 38.

Adding to 11113457780 its reverse (8775431111), we get a palindrome (19888888891).

The spelling of 11113457780 in words is "eleven billion, one hundred thirteen million, four hundred fifty-seven thousand, seven hundred eighty".