An irrational number is a number that cannot be expressed as a simple fraction, meaning it cannot be written as the ratio of two integers. Among the numbers you listed:
- \(-7\), \(8\), \(37\), \(4\), and \(3.6363636363636363...\) (which is a repeating decimal) are all rational numbers.
- \(52.781654292\) is also a rational number because it can be expressed as a fraction.
- \(\sqrt{3}\) is an irrational number because it cannot be expressed as a fraction of two integers.
Therefore, the only irrational number from the list is \(\sqrt{3}\).