11551544543 has 24 divisors (see below), whose sum is σ = 14764659840. Its totient is φ = 8936388720.

The previous prime is 11551544531. The next prime is 11551544573. The reversal of 11551544543 is 34544515511.

11551544543 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 11551544543 - 2⁶ = 11551544479 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11551544497 and 11551544506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551544573) 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 23 ways as a sum of consecutive naturals, for example, 2171 + ... + 152012.

It is an arithmetic number, because the mean of its divisors is an integer number (615194160).

Almost surely, 2^11551544543 is an apocalyptic number.

11551544543 is a deficient number, since it is larger than the sum of its proper divisors (3213115297).

11551544543 is a wasteful number, since it uses less digits than its factorization.

11551544543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154347 (or 154340 counting only the distinct ones).

The product of its digits is 120000, while the sum is 38.

The spelling of 11551544543 in words is "eleven billion, five hundred fifty-one million, five hundred forty-four thousand, five hundred forty-three".