11133355780 has 24 divisors (see below), whose sum is σ = 24186256920. Its totient is φ = 4299778560.

The previous prime is 11133355771. The next prime is 11133355829. The reversal of 11133355780 is 8755333111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 333573696 + 10799782084 = 18264^2 + 103922^2 .

It is a super-2 number, since 2×11133355780² (a number of 21 digits) contains 22 as substring.

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, 9597141 + ... + 9598300.

It is an arithmetic number, because the mean of its divisors is an integer number (1007760705).

Almost surely, 2^11133355780 is an apocalyptic number.

11133355780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11133355780 is an abundant number, since it is smaller than the sum of its proper divisors (13052901140).

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

11133355780 is a wasteful number, since it uses less digits than its factorization.

11133355780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19195479 (or 19195477 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

Adding to 11133355780 its reverse (8755333111), we get a palindrome (19888688891).

The spelling of 11133355780 in words is "eleven billion, one hundred thirty-three million, three hundred fifty-five thousand, seven hundred eighty".