11011161555556 has 24 divisors (see below), whose sum is σ = 19358990947296. Its totient is φ = 5480032740480.

The previous prime is 11011161555551. The next prime is 11011161555577. The reversal of 11011161555556 is 65555516111011.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11011161555551) 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, 2421115 + ... + 5280541.

It is an arithmetic number, because the mean of its divisors is an integer number (806624622804).

Almost surely, 2^{11011161555556} is an apocalyptic number.

It is an amenable number.

11011161555556 is a deficient number, since it is larger than the sum of its proper divisors (8347829391740).

11011161555556 is a wasteful number, since it uses less digits than its factorization.

11011161555556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863899 (or 2863897 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 43.

Adding to 11011161555556 its reverse (65555516111011), we get a palindrome (76566677666567).

The spelling of 11011161555556 in words is "eleven trillion, eleven billion, one hundred sixty-one million, five hundred fifty-five thousand, five hundred fifty-six".