11154123541 has 4 divisors (see below), whose sum is σ = 12168134784. Its totient is φ = 10140112300.

The previous prime is 11154123499. The next prime is 11154123569. The reversal of 11154123541 is 14532145111.

It is a happy number.

11154123541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11154123541 - 2¹⁹ = 11153599253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11154123571) 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 3 ways as a sum of consecutive naturals, for example, 507005605 + ... + 507005626.

It is an arithmetic number, because the mean of its divisors is an integer number (3042033696).

Almost surely, 2^11154123541 is an apocalyptic number.

11154123541 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11154123541 is a deficient number, since it is larger than the sum of its proper divisors (1014011243).

11154123541 is a wasteful number, since it uses less digits than its factorization.

11154123541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014011242.

The product of its digits is 2400, while the sum is 28.

Adding to 11154123541 its reverse (14532145111), we get a palindrome (25686268652).

The spelling of 11154123541 in words is "eleven billion, one hundred fifty-four million, one hundred twenty-three thousand, five hundred forty-one".