11350558521 has 27 divisors (see below), whose sum is σ = 17424749901. Its totient is φ = 7118509824.

The previous prime is 11350558481. The next prime is 11350558529. The reversal of 11350558521 is 12585505311.

The square root of 11350558521 is 106539.

It is a perfect power (a square), and thus also a powerful number.

11350558521 is a `hidden beast` number, since 1 + 1 + 3 + 50 + 5 + 585 + 21 = 666.

11350558521 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 4 ways, for example, as 5036031225 + 6314527296 = 70965^2 + 79464^2 .

It is not a de Polignac number, because 11350558521 - 2⁷ = 11350558393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11350558529) 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 26 ways as a sum of consecutive naturals, for example, 5432445 + ... + 5434533.

Almost surely, 2^11350558521 is an apocalyptic number.

11350558521 is the 106539-th square number.

11350558521 is the 53270-th centered octagonal number.

It is an amenable number.

11350558521 is a deficient number, since it is larger than the sum of its proper divisors (6074191380).

11350558521 is an frugal number, since it uses more digits than its factorization.

11350558521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4218 (or 2109 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 36.

Multiplying 11350558521 by its sum of digits (36), we get a square (408620106756 = 639234²).

The spelling of 11350558521 in words is "eleven billion, three hundred fifty million, five hundred fifty-eight thousand, five hundred twenty-one".