Say I have an image like this:
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEcAAAArCAYAAAAqhpU+AAAEhElEQVRo3u2aXUhbZxjHf8YoQTQppYJkY6gRDaJDdJ3VBqfvoCJs0IuFwVjrWmfbCV4o3my7cZYxNlScsIldCHilg+lwUpmsC0VM2WDOoKIo82KCYmQGPWqQmY9deCLxO6bOmo8HzkWek/c95/zf//PJA1E5UmKCXWixWB4AXwJqn04IERNO4CiDAEUPfAcYDrntfR7Aj3ie9yz3O80BKk/xkkrgE+BTID6ECRHwASoDBKZYZkt2JPkc5QmgqGW/cg9Q+PRTU1NkZ2dHLjgWi+Um8A2g9ek2NzcxmUz09/djsVjO/WWFEBeGOT/6/7BarbS1tbGysiIBH8vAhVSEPfNo5XA4aG9vZ3h4GOAn4CNg8QWCcyGY43n8+LGio6MDp9O5BNQCP0SSQ1Ycc6+spaXF43Q6TUBWpAFzLHOEEMNAGTAcqeWD4oT7EQtMIOAQBScqUXD+96r8IojFYrkGGIFrQDpwCXABDmAZ+BP4FXgihHBEBDipqamYzebfgdeP+Esi8ArwGnDP4/H8Ozg4aFapVJ8JIZbC2qw6Ozs5BpiDH6dQxKtUqgfb29t/m0ym22HNnLi4OABsNhsjIyPYbDYcDgeSJJGYmEhycjIFBQWUl5eTlpbmvy4+PT29q7m5+Y2GhoaqsARnYWGB1tZWxsbGAJ7KxfFTYEmSJIckSZfm5uZe7u3tvWE0GuuqqqpSYmNjd9fn5+ffraysVHR1dd0JK7OamZmhpqaGsbGxv4A35ey9HRiXnbAL+Aewud3ur3p6el7q7u5+tH8fo9H4QUFBwd2wYI7c8/X1kf8AyuWodJJ4zGbz/aKiIq1Op3vLp0xISMBgMHSOjo7+LHcXQp45MfJ1NUBgdkWn091yuVwef11FRYUyJSXlYcQngUKIVa/Xu6ejEB8fT05Ozm3gSsRnyHFxcUP7dXl5eUrgRrR82PFVeyQjIwPZsUc8OAeyY41GA5AXBQdWjwAn6nOO+c4oOPgNO+xSaXU1dJPAfQMEGiGE9Bzbafcr1tbWkDPr0GZOdXX12mGnfwo5UMnPzs4ilxuhDU5ubi7sNLWClQMhe3R0FHaaYqENTllZGRw+DxSIeV4Bbvrrtra2fOD8EhbMMRgM94Nc/gX75on6+/vZ3Nx0Ak/CIlrV1tbmFBYWvnNK1rwHfOiv29jYoLu7G+Dbw/KfkGpZ+CQ5OZm6urrvFxcX366vrx88ARQl0AB87q93u900NjYiSdIqO3NHJ7YCAg2nZ9GXCTaU7xFJkp6p1epO4De5NHACl4FUuZi8s9+Bu91umpubGRoacgEVJ5nUeTPntMOU161Wq7WoqAiFYq/1q9XqYqA40I3sdjtNTU1MT0+7gOpAgLnQZiWEeAZcz8zMfFhaWipKSkrQarWn2sNut9PX18fAwABbW1vzwLsy2wKSmABP/Kwk2KmsTKBKr9e/r9frtVlZWeh0OjQaDUlJScTGxrK+vo4kSSwvLzM5Ocn4+DgTExN4vd554GvgEbBxHi/7IiVPznmuAq/KxeNl2Qoc8jUPWNmZEhkBPME86D8yB3ZQ6rfzGAAAAABJRU5ErkJggg==
Is there any other possibility to read the actual text of this (it's a simple number), other than saving it as an image and running it through some OCR library?
Nope, only OCR. There is no actual text inside an image, only bits representing pixels and their colors.