11143023550561 has 32 divisors (see below), whose sum is σ = 13560549465600. Its totient is φ = 9135369980352.

The previous prime is 11143023550559. The next prime is 11143023550597. The reversal of 11143023550561 is 16505532034111.

11143023550561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11143023550561 - 2¹ = 11143023550559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11143023550561.

It is not an unprimeable number, because it can be changed into a prime (11143023550541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199192951 + ... + 199248883.

It is an arithmetic number, because the mean of its divisors is an integer number (423767170800).

Almost surely, 2^{11143023550561} is an apocalyptic number.

It is an amenable number.

11143023550561 is a deficient number, since it is larger than the sum of its proper divisors (2417525915039).

11143023550561 is an equidigital number, since it uses as much as digits as its factorization.

11143023550561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81230 (or 81216 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 37.

Adding to 11143023550561 its reverse (16505532034111), we get a palindrome (27648555584672).

The spelling of 11143023550561 in words is "eleven trillion, one hundred forty-three billion, twenty-three million, five hundred fifty thousand, five hundred sixty-one".