11055455521 has 12 divisors (see below), whose sum is σ = 12866682276. Its totient is φ = 9459211520.

The previous prime is 11055455513. The next prime is 11055455549. The reversal of 11055455521 is 12555455011.

11055455521 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 4500933921 + 6554521600 = 67089^2 + 80960^2 .

It is not a de Polignac number, because 11055455521 - 2³ = 11055455513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11055455591) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2685220 + ... + 2689333.

It is an arithmetic number, because the mean of its divisors is an integer number (1072223523).

Almost surely, 2^11055455521 is an apocalyptic number.

11055455521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11055455521 is a deficient number, since it is larger than the sum of its proper divisors (1811226755).

11055455521 is a wasteful number, since it uses less digits than its factorization.

11055455521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374592 (or 5374581 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 34.

The spelling of 11055455521 in words is "eleven billion, fifty-five million, four hundred fifty-five thousand, five hundred twenty-one".