55 million light years is about correct. Wikipedia still has 53.5 ± 1.63 Mly from older observations, but appendix I in paper https://iopscience.iop.org/article/10.3847/2041-8213/ab1141 has a bit more on the distance measurements they used. They arrive at 16.76 ± 0.75 Mpc, which translates into 54.7 ± 2.4 Mly.

He corrected himself to say 500 billion billion kilometers after mistakingly saying light years.

I haven't done the math, but I believe that roughly equates to 55 million light years.

Yup, My bad.