AWS ROOT ACCOUNT: It's possible to edit email/password of root account ?

Hello,

Yes, you can change the Email/password/mfa of root user without any issues.

Email: https://aws.amazon.com/premiumsupport/knowledge-center/change-email-address/
password: https://docs.aws.amazon.com/IAM/latest/UserGuide/id_credentials_passwords_change-root.html
MFA: https://aws.amazon.com/blogs/security/reset-your-aws-root-accounts-lost-mfa-device-faster-by-using-the-aws-management-console/

Just make sure you have access to that email address and MFA device.

Thank You